[FL-3918] Full-fledged JS SDK + npm packages (#3963)

* feat: js sdk
* refactor: move js back where it belongs
* docs: generate docs using typedoc
* feat: sdk versioning scheme
* ci: silence pvs warning
* docs: bring back old incomplete js docs
* style: readAnalog naming
* fix: rename script compatibility screens

Co-authored-by: あく <alleteam@gmail.com>

.gitignore

@@ -63,4 +63,7 @@ PVS-Studio.log
 
 .gdbinit
 
-/fbt_options_local.py
+/fbt_options_local.py
+
+# JS packages
+node_modules/

applications/debug/unit_tests/resources/unit_tests/js/basic.js

@@ -1,4 +1,15 @@
 let tests = require("tests");
+let flipper = require("flipper");
 
 tests.assert_eq(1337, 1337);
 tests.assert_eq("hello", "hello");
+
+tests.assert_eq("compatible", sdkCompatibilityStatus(0, 1));
+tests.assert_eq("firmwareTooOld", sdkCompatibilityStatus(100500, 0));
+tests.assert_eq("firmwareTooNew", sdkCompatibilityStatus(-100500, 0));
+tests.assert_eq(true, doesSdkSupport(["baseline"]));
+tests.assert_eq(false, doesSdkSupport(["abobus", "other-nonexistent-feature"]));
+
+tests.assert_eq("flipperdevices", flipper.firmwareVendor);
+tests.assert_eq(0, flipper.jsSdkVersion[0]);
+tests.assert_eq(1, flipper.jsSdkVersion[1]);

applications/system/application.fam

@@ -5,7 +5,6 @@ App(
     provides=[
         "updater_app",
         "js_app",
-        "js_app_start",
         # "archive",
     ],
 )

applications/system/js_app/application.fam

@@ -6,6 +6,16 @@ App(
     stack_size=2 * 1024,
     resources="examples",
     order=0,
+    provides=["js_app_start"],
+    sources=[
+        "js_app.c",
+        "js_modules.c",
+        "js_thread.c",
+        "plugin_api/app_api_table.cpp",
+        "views/console_view.c",
+        "modules/js_flipper.c",
+        "modules/js_tests.c",
+    ],
 )
 
 App(
@@ -13,6 +23,7 @@ App(
     apptype=FlipperAppType.STARTUP,
     entry_point="js_app_on_system_start",
     order=160,
+    sources=["js_app.c"],
 )
 
 App(

applications/system/js_app/examples/apps/Scripts/gpio.js

@@ -19,7 +19,7 @@ eventLoop.subscribe(eventLoop.timer("periodic", 1000), function (_, _item, led,
 // read potentiometer when button is pressed
 print("Press the button (PC1)");
 eventLoop.subscribe(button.interrupt(), function (_, _item, pot) {
-    print("PC0 is at", pot.read_analog(), "mV");
+    print("PC0 is at", pot.readAnalog(), "mV");
 }, pot);
 
 // the program will just exit unless this is here

applications/system/js_app/js_modules.c

@@ -1,6 +1,8 @@
 #include <core/common_defines.h>
 #include "js_modules.h"
 #include <m-array.h>
+#include <dialogs/dialogs.h>
+#include <assets_icons.h>
 
 #include "modules/js_flipper.h"
 #ifdef FW_CFG_unit_tests
@@ -76,6 +78,12 @@ JsModuleData* js_find_loaded_module(JsModules* instance, const char* name) {
 }
 
 mjs_val_t js_module_require(JsModules* modules, const char* name, size_t name_len) {
+    // Ignore the initial part of the module name
+    const char* optional_module_prefix = "@" JS_SDK_VENDOR "/fz-sdk/";
+    if(strncmp(name, optional_module_prefix, strlen(optional_module_prefix)) == 0) {
+        name += strlen(optional_module_prefix);
+    }
+
     // Check if module is already installed
     JsModuleData* module_inst = js_find_loaded_module(modules, name);
     if(module_inst) { //-V547
@@ -175,3 +183,133 @@ void* js_module_get(JsModules* modules, const char* name) {
     furi_string_free(module_name);
     return module_inst ? module_inst->context : NULL;
 }
+
+typedef enum {
+    JsSdkCompatStatusCompatible,
+    JsSdkCompatStatusFirmwareTooOld,
+    JsSdkCompatStatusFirmwareTooNew,
+} JsSdkCompatStatus;
+
+/**
+ * @brief Checks compatibility between the firmware and the JS SDK version
+ *        expected by the script
+ */
+static JsSdkCompatStatus
+    js_internal_sdk_compatibility_status(int32_t exp_major, int32_t exp_minor) {
+    if(exp_major < JS_SDK_MAJOR) return JsSdkCompatStatusFirmwareTooNew;
+    if(exp_major > JS_SDK_MAJOR || exp_minor > JS_SDK_MINOR)
+        return JsSdkCompatStatusFirmwareTooOld;
+    return JsSdkCompatStatusCompatible;
+}
+
+#define JS_SDK_COMPAT_ARGS \
+    int32_t major, minor;  \
+    JS_FETCH_ARGS_OR_RETURN(mjs, JS_EXACTLY, JS_ARG_INT32(&major), JS_ARG_INT32(&minor));
+
+void js_sdk_compatibility_status(struct mjs* mjs) {
+    JS_SDK_COMPAT_ARGS;
+    JsSdkCompatStatus status = js_internal_sdk_compatibility_status(major, minor);
+    switch(status) {
+    case JsSdkCompatStatusCompatible:
+        mjs_return(mjs, mjs_mk_string(mjs, "compatible", ~0, 0));
+        return;
+    case JsSdkCompatStatusFirmwareTooOld:
+        mjs_return(mjs, mjs_mk_string(mjs, "firmwareTooOld", ~0, 0));
+        return;
+    case JsSdkCompatStatusFirmwareTooNew:
+        mjs_return(mjs, mjs_mk_string(mjs, "firmwareTooNew", ~0, 0));
+        return;
+    }
+}
+
+void js_is_sdk_compatible(struct mjs* mjs) {
+    JS_SDK_COMPAT_ARGS;
+    JsSdkCompatStatus status = js_internal_sdk_compatibility_status(major, minor);
+    mjs_return(mjs, mjs_mk_boolean(mjs, status == JsSdkCompatStatusCompatible));
+}
+
+/**
+ * @brief Asks the user whether to continue executing an incompatible script
+ */
+static bool js_internal_compat_ask_user(const char* message) {
+    DialogsApp* dialogs = furi_record_open(RECORD_DIALOGS);
+    DialogMessage* dialog = dialog_message_alloc();
+    dialog_message_set_header(dialog, message, 64, 0, AlignCenter, AlignTop);
+    dialog_message_set_text(
+        dialog, "This script may not\nwork as expected", 79, 32, AlignCenter, AlignCenter);
+    dialog_message_set_icon(dialog, &I_Warning_30x23, 0, 18);
+    dialog_message_set_buttons(dialog, "Go back", NULL, "Run anyway");
+    DialogMessageButton choice = dialog_message_show(dialogs, dialog);
+    dialog_message_free(dialog);
+    furi_record_close(RECORD_DIALOGS);
+    return choice == DialogMessageButtonRight;
+}
+
+void js_check_sdk_compatibility(struct mjs* mjs) {
+    JS_SDK_COMPAT_ARGS;
+    JsSdkCompatStatus status = js_internal_sdk_compatibility_status(major, minor);
+    if(status != JsSdkCompatStatusCompatible) {
+        FURI_LOG_E(
+            TAG,
+            "Script requests JS SDK %ld.%ld, firmware provides JS SDK %d.%d",
+            major,
+            minor,
+            JS_SDK_MAJOR,
+            JS_SDK_MINOR);
+
+        const char* message = (status == JsSdkCompatStatusFirmwareTooOld) ? "Outdated Firmware" :
+                                                                            "Outdated Script";
+        if(!js_internal_compat_ask_user(message)) {
+            JS_ERROR_AND_RETURN(mjs, MJS_NOT_IMPLEMENTED_ERROR, "Incompatible script");
+        }
+    }
+}
+
+static const char* extra_features[] = {
+    "baseline", // dummy "feature"
+};
+
+/**
+ * @brief Determines whether a feature is supported
+ */
+static bool js_internal_supports(const char* feature) {
+    for(size_t i = 0; i < COUNT_OF(extra_features); i++) { // -V1008
+        if(strcmp(feature, extra_features[i]) == 0) return true;
+    }
+    return false;
+}
+
+/**
+ * @brief Determines whether all of the requested features are supported
+ */
+static bool js_internal_supports_all_of(struct mjs* mjs, mjs_val_t feature_arr) {
+    furi_assert(mjs_is_array(feature_arr));
+
+    for(size_t i = 0; i < mjs_array_length(mjs, feature_arr); i++) {
+        mjs_val_t feature = mjs_array_get(mjs, feature_arr, i);
+        const char* feature_str = mjs_get_string(mjs, &feature, NULL);
+        if(!feature_str) return false;
+
+        if(!js_internal_supports(feature_str)) return false;
+    }
+
+    return true;
+}
+
+void js_does_sdk_support(struct mjs* mjs) {
+    mjs_val_t features;
+    JS_FETCH_ARGS_OR_RETURN(mjs, JS_EXACTLY, JS_ARG_ARR(&features));
+    mjs_return(mjs, mjs_mk_boolean(mjs, js_internal_supports_all_of(mjs, features)));
+}
+
+void js_check_sdk_features(struct mjs* mjs) {
+    mjs_val_t features;
+    JS_FETCH_ARGS_OR_RETURN(mjs, JS_EXACTLY, JS_ARG_ARR(&features));
+    if(!js_internal_supports_all_of(mjs, features)) {
+        FURI_LOG_E(TAG, "Script requests unsupported features");
+
+        if(!js_internal_compat_ask_user("Unsupported Feature")) {
+            JS_ERROR_AND_RETURN(mjs, MJS_NOT_IMPLEMENTED_ERROR, "Incompatible script");
+        }
+    }
+}

applications/system/js_app/js_modules.h

@@ -9,6 +9,10 @@
 #define PLUGIN_APP_ID      "js"
 #define PLUGIN_API_VERSION 1
 
+#define JS_SDK_VENDOR "flipperdevices"
+#define JS_SDK_MAJOR  0
+#define JS_SDK_MINOR  1
+
 /**
  * @brief Returns the foreign pointer in `obj["_"]`
  */
@@ -275,3 +279,28 @@ mjs_val_t js_module_require(JsModules* modules, const char* name, size_t name_le
  * @returns Pointer to module context, NULL if the module is not instantiated
  */
 void* js_module_get(JsModules* modules, const char* name);
+
+/**
+ * @brief `sdkCompatibilityStatus` function
+ */
+void js_sdk_compatibility_status(struct mjs* mjs);
+
+/**
+ * @brief `isSdkCompatible` function
+ */
+void js_is_sdk_compatible(struct mjs* mjs);
+
+/**
+ * @brief `checkSdkCompatibility` function
+ */
+void js_check_sdk_compatibility(struct mjs* mjs);
+
+/**
+ * @brief `doesSdkSupport` function
+ */
+void js_does_sdk_support(struct mjs* mjs);
+
+/**
+ * @brief `checkSdkFeatures` function
+ */
+void js_check_sdk_features(struct mjs* mjs);

applications/system/js_app/js_thread.c

@@ -231,18 +231,29 @@ static int32_t js_thread(void* arg) {
     struct mjs* mjs = mjs_create(worker);
     worker->modules = js_modules_create(mjs, worker->resolver);
     mjs_val_t global = mjs_get_global(mjs);
-    mjs_set(mjs, global, "print", ~0, MJS_MK_FN(js_print));
-    mjs_set(mjs, global, "delay", ~0, MJS_MK_FN(js_delay));
-    mjs_set(mjs, global, "toString", ~0, MJS_MK_FN(js_global_to_string));
-    mjs_set(mjs, global, "ffi_address", ~0, MJS_MK_FN(js_ffi_address));
-    mjs_set(mjs, global, "require", ~0, MJS_MK_FN(js_require));
-
     mjs_val_t console_obj = mjs_mk_object(mjs);
-    mjs_set(mjs, console_obj, "log", ~0, MJS_MK_FN(js_console_log));
+
-    mjs_set(mjs, console_obj, "warn", ~0, MJS_MK_FN(js_console_warn));
+    JS_ASSIGN_MULTI(mjs, global) {
-    mjs_set(mjs, console_obj, "error", ~0, MJS_MK_FN(js_console_error));
+        JS_FIELD("print", MJS_MK_FN(js_print));
-    mjs_set(mjs, console_obj, "debug", ~0, MJS_MK_FN(js_console_debug));
+        JS_FIELD("delay", MJS_MK_FN(js_delay));
-    mjs_set(mjs, global, "console", ~0, console_obj);
+        JS_FIELD("toString", MJS_MK_FN(js_global_to_string));
+        JS_FIELD("ffi_address", MJS_MK_FN(js_ffi_address));
+        JS_FIELD("require", MJS_MK_FN(js_require));
+        JS_FIELD("console", console_obj);
+
+        JS_FIELD("sdkCompatibilityStatus", MJS_MK_FN(js_sdk_compatibility_status));
+        JS_FIELD("isSdkCompatible", MJS_MK_FN(js_is_sdk_compatible));
+        JS_FIELD("checkSdkCompatibility", MJS_MK_FN(js_check_sdk_compatibility));
+        JS_FIELD("doesSdkSupport", MJS_MK_FN(js_does_sdk_support));
+        JS_FIELD("checkSdkFeatures", MJS_MK_FN(js_check_sdk_features));
+    }
+
+    JS_ASSIGN_MULTI(mjs, console_obj) {
+        JS_FIELD("log", MJS_MK_FN(js_console_log));
+        JS_FIELD("warn", MJS_MK_FN(js_console_warn));
+        JS_FIELD("error", MJS_MK_FN(js_console_error));
+        JS_FIELD("debug", MJS_MK_FN(js_console_debug));
+    }
 
     mjs_set_ffi_resolver(mjs, js_dlsym, worker->resolver);
 

applications/system/js_app/modules/js_flipper.c

@@ -27,11 +27,19 @@ static void js_flipper_get_battery(struct mjs* mjs) {
 
 void* js_flipper_create(struct mjs* mjs, mjs_val_t* object, JsModules* modules) {
     UNUSED(modules);
+    mjs_val_t sdk_vsn = mjs_mk_array(mjs);
+    mjs_array_push(mjs, sdk_vsn, mjs_mk_number(mjs, JS_SDK_MAJOR));
+    mjs_array_push(mjs, sdk_vsn, mjs_mk_number(mjs, JS_SDK_MINOR));
+
     mjs_val_t flipper_obj = mjs_mk_object(mjs);
-    mjs_set(mjs, flipper_obj, "getModel", ~0, MJS_MK_FN(js_flipper_get_model));
-    mjs_set(mjs, flipper_obj, "getName", ~0, MJS_MK_FN(js_flipper_get_name));
-    mjs_set(mjs, flipper_obj, "getBatteryCharge", ~0, MJS_MK_FN(js_flipper_get_battery));
     *object = flipper_obj;
+    JS_ASSIGN_MULTI(mjs, flipper_obj) {
+        JS_FIELD("getModel", MJS_MK_FN(js_flipper_get_model));
+        JS_FIELD("getName", MJS_MK_FN(js_flipper_get_name));
+        JS_FIELD("getBatteryCharge", MJS_MK_FN(js_flipper_get_battery));
+        JS_FIELD("firmwareVendor", mjs_mk_string(mjs, JS_SDK_VENDOR, ~0, false));
+        JS_FIELD("jsSdkVersion", sdk_vsn);
+    }
 
     return (void*)1;
 }

applications/system/js_app/modules/js_gpio.c

@@ -220,7 +220,7 @@ static void js_gpio_interrupt(struct mjs* mjs) {
  * let gpio = require("gpio");
  * let pot = gpio.get("pc0");
  * pot.init({ direction: "in", inMode: "analog" });
- * print("voltage:" pot.read_analog(), "mV");
+ * print("voltage:" pot.readAnalog(), "mV");
  * ```
  */
 static void js_gpio_read_analog(struct mjs* mjs) {
@@ -274,7 +274,7 @@ static void js_gpio_get(struct mjs* mjs) {
     mjs_set(mjs, manager, "init", ~0, MJS_MK_FN(js_gpio_init));
     mjs_set(mjs, manager, "write", ~0, MJS_MK_FN(js_gpio_write));
     mjs_set(mjs, manager, "read", ~0, MJS_MK_FN(js_gpio_read));
-    mjs_set(mjs, manager, "read_analog", ~0, MJS_MK_FN(js_gpio_read_analog));
+    mjs_set(mjs, manager, "readAnalog", ~0, MJS_MK_FN(js_gpio_read_analog));
     mjs_set(mjs, manager, "interrupt", ~0, MJS_MK_FN(js_gpio_interrupt));
     mjs_return(mjs, manager);
 

applications/system/js_app/packages/create-fz-app/README.md

@@ -0,0 +1,20 @@
+# Flipper Zero JavaScript SDK Wizard
+This package contains an interactive wizard that lets you scaffold a JavaScript
+application for Flipper Zero.
+
+## Getting started
+Create your application using the interactive wizard:
+```shell
+npx @flipperdevices/create-fz-app@latest
+```
+
+Then, enter the directory with your application and launch it:
+```shell
+cd my-flip-app
+npm start
+```
+
+You are free to use `pnpm` or `yarn` instead of `npm`.
+
+## Documentation
+Check out the [JavaScript section in the Developer Documentation](https://developer.flipper.net/flipperzero/doxygen/js.html)

applications/system/js_app/packages/create-fz-app/index.js

@@ -0,0 +1,68 @@
+#!/usr/bin/env node
+import prompts from "prompts";
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "url";
+import { spawnSync } from "node:child_process";
+import { replaceInFileSync } from "replace-in-file";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+(async () => {
+    const { name, pkgManager, confirm } = await prompts([
+        {
+            type: "text",
+            name: "name",
+            message: "What is the name of your project?",
+            initial: "my-flip-app"
+        },
+        {
+            type: "select",
+            name: "pkgManager",
+            message: "What package manager should your project use?",
+            choices: [
+                { title: "npm", value: "npm" },
+                { title: "pnpm", value: "pnpm" },
+                { title: "yarn", value: "yarn" },
+            ],
+        },
+        {
+            type: "confirm",
+            name: "confirm",
+            message: "Create project?",
+            initial: true,
+        },
+    ]);
+
+    if (!confirm)
+        return;
+
+    if (fs.existsSync(name)) {
+        const { replace } = await prompts([
+            {
+                type: "confirm",
+                name: "replace",
+                message: `File or directory \`${name}\` already exists. Continue anyway?`,
+                initial: false,
+            },
+        ]);
+        if (!replace)
+            return;
+    }
+
+    fs.rmSync(name, { recursive: true, force: true });
+
+    console.log("Copying files...");
+    fs.cpSync(path.resolve(__dirname, "template"), name, { recursive: true });
+    replaceInFileSync({ files: `${name}/**/*`, from: /<app_name>/g, to: name });
+
+    console.log("Installing packages...");
+    spawnSync("bash", ["-c", `cd ${name} && ${pkgManager} install`], {
+        cwd: process.cwd(),
+        detached: true,
+        stdio: "inherit",
+    });
+
+    console.log(`Done! Created ${name}. Run \`cd ${name} && ${pkgManager} start\` to run it on your Flipper.`);
+})();

applications/system/js_app/packages/create-fz-app/package.json

@@ -0,0 +1,22 @@
+{
+  "name": "@flipperdevices/create-fz-app",
+  "version": "0.1.0",
+  "description": "Template package for JS apps Flipper Zero",
+  "bin": "index.js",
+  "type": "module",
+  "keywords": [
+    "flipper",
+    "flipper zero"
+  ],
+  "author": "Flipper Devices",
+  "license": "GPL-3.0-only",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/flipperdevices/flipperzero-firmware.git",
+    "directory": "applications/system/js_app/packages/create-fz-app"
+  },
+  "dependencies": {
+    "prompts": "^2.4.2",
+    "replace-in-file": "^8.2.0"
+  }
+}

applications/system/js_app/packages/create-fz-app/pnpm-lock.yaml

@@ -0,0 +1,373 @@
+lockfileVersion: '9.0'
+
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
+importers:
+
+  .:
+    dependencies:
+      prompts:
+        specifier: ^2.4.2
+        version: 2.4.2
+      replace-in-file:
+        specifier: ^8.2.0
+        version: 8.2.0
+
+packages:
+
+  '@isaacs/cliui@8.0.2':
+    resolution: {integrity: sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA==}
+    engines: {node: '>=12'}
+
+  '@pkgjs/parseargs@0.11.0':
+    resolution: {integrity: sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==}
+    engines: {node: '>=14'}
+
+  ansi-regex@5.0.1:
+    resolution: {integrity: sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==}
+    engines: {node: '>=8'}
+
+  ansi-regex@6.1.0:
+    resolution: {integrity: sha512-7HSX4QQb4CspciLpVFwyRe79O3xsIZDDLER21kERQ71oaPodF8jL725AgJMFAYbooIqolJoRLuM81SpeUkpkvA==}
+    engines: {node: '>=12'}
+
+  ansi-styles@4.3.0:
+    resolution: {integrity: sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==}
+    engines: {node: '>=8'}
+
+  ansi-styles@6.2.1:
+    resolution: {integrity: sha512-bN798gFfQX+viw3R7yrGWRqnrN2oRkEkUjjl4JNn4E8GxxbjtG3FbrEIIY3l8/hrwUwIeCZvi4QuOTP4MErVug==}
+    engines: {node: '>=12'}
+
+  balanced-match@1.0.2:
+    resolution: {integrity: sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==}
+
+  brace-expansion@2.0.1:
+    resolution: {integrity: sha512-XnAIvQ8eM+kC6aULx6wuQiwVsnzsi9d3WxzV3FpWTGA19F621kwdbsAcFKXgKUHZWsy+mY6iL1sHTxWEFCytDA==}
+
+  chalk@5.3.0:
+    resolution: {integrity: sha512-dLitG79d+GV1Nb/VYcCDFivJeK1hiukt9QjRNVOsUtTy1rR1YJsmpGGTZ3qJos+uw7WmWF4wUwBd9jxjocFC2w==}
+    engines: {node: ^12.17.0 || ^14.13 || >=16.0.0}
+
+  cliui@8.0.1:
+    resolution: {integrity: sha512-BSeNnyus75C4//NQ9gQt1/csTXyo/8Sb+afLAkzAptFuMsod9HFokGNudZpi/oQV73hnVK+sR+5PVRMd+Dr7YQ==}
+    engines: {node: '>=12'}
+
+  color-convert@2.0.1:
+    resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
+    engines: {node: '>=7.0.0'}
+
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+      escalade: 3.2.0
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applications/system/js_app/packages/create-fz-app/template/.gitignore

@@ -0,0 +1,2 @@
+/dist
+node_modules/

applications/system/js_app/packages/create-fz-app/template/fz-sdk.config.json5

@@ -0,0 +1,23 @@
+{
+    build: {
+        // Where to put the compiled file
+        output: "dist/<app_name>.js",
+
+        // Whether to reduce the final file size at the cost of readability and
+        // clarity of error messages
+        minify: false,
+
+        // Set this to `false` if you've thoroughly read the documentation and
+        // are sure that you can use manual version checks to your advantage
+        enforceSdkVersion: true,
+    },
+
+    upload: {
+        // Where to grab the file from. If you're not doing any extra processing
+        // after the SDK, this should match `build.output`
+        input: "dist/<app_name>.js",
+
+        // Where to put the file on the device
+        output: "/ext/apps/Scripts/<app_name>.js",
+    },
+}

applications/system/js_app/packages/create-fz-app/template/index.ts

@@ -0,0 +1,30 @@
+// import modules
+// caution: `eventLoop` HAS to be imported before `gui`, and `gui` HAS to be
+// imported before any `gui` submodules.
+import * as eventLoop from "@flipperdevices/fz-sdk/event_loop";
+import * as gui from "@flipperdevices/fz-sdk/gui";
+import * as dialog from "@flipperdevices/fz-sdk/gui/dialog";
+
+// a common pattern is to declare all the views that your app uses on one object
+const views = {
+    dialog: dialog.makeWith({
+        header: "Hello from <app_name>",
+        text: "Check out index.ts and\nchange something :)",
+        center: "Gonna do that!",
+    }),
+};
+
+// stop app on center button press
+eventLoop.subscribe(views.dialog.input, (_sub, button, eventLoop) => {
+    if (button === "center")
+        eventLoop.stop();
+}, eventLoop);
+
+// stop app on back button press
+eventLoop.subscribe(gui.viewDispatcher.navigation, (_sub, _item, eventLoop) => {
+    eventLoop.stop();
+}, eventLoop);
+
+// run app
+gui.viewDispatcher.switchTo(views.dialog);
+eventLoop.run();

applications/system/js_app/packages/create-fz-app/template/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "<app_name>",
+  "version": "1.0.0",
+  "scripts": {
+    "build": "tsc && node node_modules/@flipperdevices/fz-sdk/sdk.js build",
+    "start": "npm run build && node node_modules/@flipperdevices/fz-sdk/sdk.js upload"
+  },
+  "devDependencies": {
+    "@flipperdevices/fz-sdk": "^0.1",
+    "typescript": "^5.6.3"
+  }
+}

applications/system/js_app/packages/create-fz-app/template/tsconfig.json

@@ -0,0 +1,20 @@
+{
+    "compilerOptions": {
+        "outDir": "dist",
+        "checkJs": true,
+        "module": "CommonJS",
+        "noLib": true,
+        "target": "ES2015",
+    },
+    "files": [
+        "./node_modules/@flipperdevices/fz-sdk/global.d.ts",
+    ],
+    "include": [
+        "./**/*.ts",
+        "./**/*.js"
+    ],
+    "exclude": [
+        "./node_modules/**/*",
+        "dist/**/*",
+    ],
+}

applications/system/js_app/packages/fz-sdk/.gitignore

@@ -0,0 +1 @@
+docs/

applications/system/js_app/packages/fz-sdk/README.md

@@ -0,0 +1,31 @@
+# Flipper Zero JavaScript SDK
+This package contains official tooling and typings for developing Flipper Zero
+applications in JavaScript.
+
+## Getting started
+Create your application using the interactive wizard:
+```shell
+npx @flipperdevices/create-fz-app@latest
+```
+
+Then, enter the directory with your application and launch it:
+```shell
+cd my-flip-app
+npm start
+```
+
+You are free to use `pnpm` or `yarn` instead of `npm`.
+
+## Versioning
+For each version of this package, the major and minor components match those of
+the Flipper Zero JS SDK version that that package version targets. This version
+follows semver. For example, apps compiled with SDK version `0.1.0` will be
+compatible with SDK versions `0.1`...`1.0` (not including `1.0`).
+
+Every API has a version history reflected in its JSDoc comment. It is heavily
+recommended to check SDK compatibility using a combination of
+`sdkCompatibilityStatus`, `isSdkCompatible`, `assertSdkCompatibility` depending
+on your use case.
+
+## Documentation
+Check out the [JavaScript section in the Developer Documentation](https://developer.flipper.net/flipperzero/doxygen/js.html)

applications/system/js_app/packages/fz-sdk/badusb/index.d.ts

@@ -1,8 +1,10 @@
 /**
  * @brief Special key codes that this module recognizes
+ * @version Added in JS SDK 0.1
  */
 export type ModifierKey = "CTRL" | "SHIFT" | "ALT" | "GUI";
 
+/** @version Added in JS SDK 0.1 */
 export type MainKey =
     "DOWN" | "LEFT" | "RIGHT" | "UP" |
 
@@ -28,16 +30,19 @@ export type MainKey =
     "m" | "n" | "o" | "p" | "q" | "r" | "s" | "t" | "u" | "v" | "w" | "x" |
     "y" | "z";
 
+/** @version Added in JS SDK 0.1 */
 export type KeyCode = MainKey | ModifierKey | number;
 
 /**
  * @brief Initializes the module
  * @param settings USB device settings. Omit to select default parameters
+ * @version Added in JS SDK 0.1
  */
 export declare function setup(settings?: { vid: number, pid: number, mfrName?: string, prodName?: string }): void;
 
 /**
  * @brief Tells whether the virtual USB HID device has successfully connected
+ * @version Added in JS SDK 0.1
  */
 export declare function isConnected(): boolean;
 
@@ -46,6 +51,7 @@ export declare function isConnected(): boolean;
  * @param keys The arguments represent a set of keys to. Out of that set, only
  *             one of the keys may represent a "main key" (see `MainKey`), with
  *             the rest being modifier keys (see `ModifierKey`).
+ * @version Added in JS SDK 0.1
  */
 export declare function press(...keys: KeyCode[]): void;
 
@@ -54,6 +60,7 @@ export declare function press(...keys: KeyCode[]): void;
  * @param keys The arguments represent a set of keys to. Out of that set, only
  *             one of the keys may represent a "main key" (see `MainKey`), with
  *             the rest being modifier keys (see `ModifierKey`).
+ * @version Added in JS SDK 0.1
  */
 export declare function hold(...keys: KeyCode[]): void;
 
@@ -62,6 +69,7 @@ export declare function hold(...keys: KeyCode[]): void;
  * @param keys The arguments represent a set of keys to. Out of that set, only
  *             one of the keys may represent a "main key" (see `MainKey`), with
  *             the rest being modifier keys (see `ModifierKey`).
+ * @version Added in JS SDK 0.1
  */
 export declare function release(...keys: KeyCode[]): void;
 
@@ -69,6 +77,7 @@ export declare function release(...keys: KeyCode[]): void;
  * @brief Prints a string by repeatedly pressing and releasing keys
  * @param string The string to print
  * @param delay How many milliseconds to wait between key presses
+ * @version Added in JS SDK 0.1
  */
 export declare function print(string: string, delay?: number): void;
 
@@ -77,5 +86,6 @@ export declare function print(string: string, delay?: number): void;
  *        "Enter" after printing the string
  * @param string The string to print
  * @param delay How many milliseconds to wait between key presses
+ * @version Added in JS SDK 0.1
  */
 export declare function println(string: string, delay?: number): void;

applications/system/js_app/packages/fz-sdk/docs_readme.md

@@ -0,0 +1 @@
+# Welcome

applications/system/js_app/packages/fz-sdk/event_loop/index.d.ts

@@ -0,0 +1,182 @@
+/**
+ * Module for dealing with events
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * ```
+ * 
+ * The event loop is central to event-based programming in many frameworks, and
+ * our JS subsystem is no exception. It is a good idea to familiarize yourself
+ * with the event loop first before using any of the advanced modules (e.g. GPIO
+ * and GUI).
+ * 
+ * # Conceptualizing the event loop
+ * If you ever wrote JavaScript before, you have definitely seen callbacks. It's
+ * when a function accepts another function (usually an anonymous one) as one of
+ * the arguments, which it will call later on, e.g. when an event happens or
+ * when data becomes ready:
+ * ```js
+ * setTimeout(function() { console.log("Hello, World!") }, 1000);
+ * ```
+ * 
+ * Many JavaScript engines employ a queue that the runtime fetches events from
+ * as they occur, subsequently calling the corresponding callbacks. This is done
+ * in a long-running loop, hence the name "event loop". Here's the pseudocode
+ * for a typical event loop:
+ * ```js
+ * while(loop_is_running()) {
+ *     if(event_available_in_queue()) {
+ *         let event = fetch_event_from_queue();
+ *         let callback = get_callback_associated_with(event);
+ *         if(callback)
+ *             callback(get_extra_data_for(event));
+ *     } else {
+ *         // avoid wasting CPU time
+ *         sleep_until_any_event_becomes_available();
+ *     }
+ * }
+ * ```
+ * 
+ * Most JS runtimes enclose the event loop within themselves, so that most JS
+ * programmers does not even need to be aware of its existence. This is not the
+ * case with our JS subsystem.
+ * 
+ * # Example
+ * This is how one would write something similar to the `setTimeout` example
+ * above:
+ * ```js
+ * // import module
+ * let eventLoop = require("event_loop");
+ * 
+ * // create an event source that will fire once 1 second after it has been created
+ * let timer = eventLoop.timer("oneshot", 1000);
+ * 
+ * // subscribe a callback to the event source
+ * eventLoop.subscribe(timer, function(_subscription, _item, eventLoop) {
+ *     print("Hello, World!");
+ *     eventLoop.stop();
+ * }, eventLoop); // notice this extra argument. we'll come back to this later
+ * 
+ * // run the loop until it is stopped
+ * eventLoop.run();
+ * 
+ * // the previous line will only finish executing once `.stop()` is called, hence
+ * // the following line will execute only after "Hello, World!" is printed
+ * print("Stopped");
+ * ```
+ * 
+ * I promised you that we'll come back to the extra argument after the callback
+ * function. Our JavaScript engine does not support closures (anonymous
+ * functions that access values outside of their arguments), so we ask
+ * `subscribe` to pass an outside value (namely, `eventLoop`) as an argument to
+ * the callback so that we can access it. We can modify this extra state:
+ * ```js
+ * // this timer will fire every second
+ * let timer = eventLoop.timer("periodic", 1000);
+ * eventLoop.subscribe(timer, function(_subscription, _item, counter, eventLoop) {
+ *     print("Counter is at:", counter);
+ *     if(counter === 10)
+ *         eventLoop.stop();
+ *     // modify the extra arguments that will be passed to us the next time
+ *     return [counter + 1, eventLoop];
+ * }, 0, eventLoop);
+ * ```
+ * 
+ * Because we have two extra arguments, if we return anything other than an
+ * array of length 2, the arguments will be kept as-is for the next call.
+ * 
+ * The first two arguments that get passed to our callback are:
+ *   - The subscription manager that lets us `.cancel()` our subscription
+ *   - The event item, used for events that have extra data. Timer events do
+ *     not, they just produce `undefined`.
+ *
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+/**
+ * @ignore
+ */
+type Lit = undefined | null | {};
+
+/**
+ * Subscription control interface
+ * @version Added in JS SDK 0.1
+ */
+export interface Subscription {
+    /**
+     * Cancels the subscription, preventing any future events managed by the
+     * subscription from firing
+     * @version Added in JS SDK 0.1
+     */
+    cancel(): void;
+}
+
+/**
+ * Opaque event source identifier
+ * @version Added in JS SDK 0.1
+ */
+export type Contract<Item = undefined> = symbol & { "__tag__": "contract" };
+// introducing a nominal type in a hacky way; the `__tag__` property doesn't really exist.
+
+/**
+ * A callback can be assigned to an event loop to listen to an event. It may
+ * return an array with values that will be passed to it as arguments the next
+ * time that it is called. The first argument is always the subscription
+ * manager, and the second argument is always the item that trigged the event.
+ * The type of the item is defined by the event source.
+ * @version Added in JS SDK 0.1
+ */
+export type Callback<Item, Args extends Lit[]> = (subscription: Subscription, item: Item, ...args: Args) => Args | undefined | void;
+
+/**
+ * Subscribes a callback to an event
+ * @param contract Event identifier
+ * @param callback Function to call when the event is triggered
+ * @param args Initial arguments passed to the callback
+ * @version Added in JS SDK 0.1
+ */
+export function subscribe<Item, Args extends Lit[]>(contract: Contract<Item>, callback: Callback<Item, Args>, ...args: Args): Subscription;
+/**
+ * Runs the event loop until it is stopped (potentially never)
+ * @version Added in JS SDK 0.1
+ */
+export function run(): void | never;
+/**
+ * Stops the event loop
+ * @version Added in JS SDK 0.1
+ */
+export function stop(): void;
+
+/**
+ * Creates a timer event that can be subscribed to just like any other event
+ * @param mode Either `"oneshot"` or `"periodic"`
+ * @param interval Timer interval in milliseconds
+ * @version Added in JS SDK 0.1
+ */
+export function timer(mode: "oneshot" | "periodic", interval: number): Contract;
+
+/**
+ * Message queue
+ * @version Added in JS SDK 0.1
+ */
+export declare class Queue<T> {
+    /**
+     * Message event
+     * @version Added in JS SDK 0.1
+     */
+    input: Contract<T>;
+    /**
+     * Sends a message to the queue
+     * @param message message to send
+     * @version Added in JS SDK 0.1
+     */
+    send(message: T): void;
+}
+
+/**
+ * Creates a message queue
+ * @param length maximum queue capacity
+ * @version Added in JS SDK 0.1
+ */
+export function queue<T>(length: number): Queue<T>;

applications/system/js_app/packages/fz-sdk/flipper/index.d.ts

@@ -0,0 +1,41 @@
+/**
+ * Module for querying device properties
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+/**
+ * @brief Returns the device model
+ * @version Added in JS SDK 0.1
+ */
+export declare function getModel(): string;
+
+/**
+ * @brief Returns the name of the virtual dolphin
+ * @version Added in JS SDK 0.1
+ */
+export declare function getName(): string;
+
+/**
+ * @brief Returns the battery charge percentage
+ * @version Added in JS SDK 0.1
+ */
+export declare function getBatteryCharge(): number;
+
+/**
+ * @warning Do **NOT** use this to check the presence or absence of features. If
+ *          you do, I'm gonna be sad :( Instead, refer to `checkSdkFeatures` and
+ *          other similar mechanisms.
+ * @note Original firmware reports `"flipperdevices"`.
+ * @version Added in JS SDK 0.1
+ */
+export declare const firmwareVendor: string;
+
+/**
+ * @warning Do **NOT** use this to check the presence or absence of features. If
+ *          you do, I'm gonna be sad :( Instead, refer to
+ *          `checkSdkCompatibility` and other similar mechanisms.
+ * @note You're looking at JS SDK 0.1
+ * @version Added in JS SDK 0.1
+ */
+export declare const jsSdkVersion: [number, number];

applications/system/js_app/packages/fz-sdk/global.d.ts

@@ -0,0 +1,344 @@
+/**
+ * Things from this module are automatically available to you without having to
+ * explicitly import anything.
+ * 
+ * # SDK versioning and features
+ * 
+ * ## Motivation
+ * It is very important that you check that features are implemented before you
+ * use them. By adding the necessary checks, you ensure that your users get a
+ * clear warning instead of a cryptic error message when running the script.
+ * 
+ * This system has been designed in collaboration with our community in order to
+ * make things better for everybody involved. You can find out more in this
+ * discussion: https://github.com/flipperdevices/flipperzero-firmware/pull/3961
+ * 
+ * ## Community agreement
+ * Each interpreter implementation (aka "JS SDK", aka "JS API"), including
+ * those found in third-party firmware distributions, defines two markers for
+ * signaling what it supports: the **SDK version** and the
+ * **extra feature set**.
+ * 
+ * The **SDK version** consists of two semver-like integer components: the major
+ * version and the minor version. Like semver, the major version is bumped when
+ * a breaking change is introduced (i.e. one that would require correction of
+ * apps by their developers), and the minor version is bumped when a new
+ * non-breaking feature is introduced. Because we have adopted TypeScript,
+ * the https://www.semver-ts.org/ standard is used to determine whether a change
+ * is breaking or not. The basis of `semver-ts` is the "no new red squiggles"
+ * rule.
+ * 
+ * Every major version is associated with a set of **extra features** that are
+ * present in some firmware distributions but not others. Distributions may
+ * cross-port features between each other, until at some point they get ported
+ * into the upstream firmware distribution. With the next major release of the
+ * JS SDK, all extra features present in the upstream distribution are now
+ * declared **baseline features**, and thus no longer recognized as "extra
+ * features".
+ * 
+ * Before using a feature, you must check that the interpreter that you're
+ * running on actually supports it. If you don't, the portability of your
+ * application will suffer.
+ * 
+ * ## Implementation
+ * Use the following functions to check version compatibility:
+ *   - `checkSdkCompatibility` when your script absolutely cannot function on an
+ *     incompatible interpreter
+ *   - `isSdkCompatible` when your script can leverage multiple interpreter
+ *     editions to its advantage
+ *   - `sdkCompatibilityStatus` when you need a detailed status on compatibility
+ * 
+ * Use the following functions to check feature compatibility:
+ *   - `checkSdkFeatures` when your script absolutely cannot function on an
+ *     incompatible interpreter
+ *   - `doesSdkSupport` when your script can leverage multiple interpreter
+ *     editions to its advantage
+ * 
+ * ## Automatic version enforcement
+ * The SDK will automatically insert a call to `checkSdkCompatibility` in the
+ * beginning of the resulting script. If you would like to disable this check
+ * and instead use other manual compatibility checking facilities, edit your
+ * `fz-sdk.config.json5`.
+ * 
+ * # Standard library
+ * Standard library features are mostly unimplemented. This module defines,
+ * among other things, the features that _are_ implemented.
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+/**
+ * @brief Checks compatibility between the script and the JS SDK that the
+ *        firmware provides
+ * 
+ * @note You're looking at JS SDK v0.1
+ * 
+ * @param expectedMajor JS SDK major version expected by the script
+ * @param expectedMinor JS SDK minor version expected by the script
+ * @returns Compatibility status:
+ *   - `"compatible"` if the script and the JS SDK are compatible
+ *   - `"firmwareTooOld"` if the expected major version is larger than the
+ *     version of the firmware, or if the expected minor version is larger than
+ *     the version of the firmware
+ *   - `"firmwareTooNew"` if the expected major version is lower than the
+ *     version of the firmware
+ * @version Added in JS SDK 0.1
+ */
+declare function sdkCompatibilityStatus(expectedMajor: number, expectedMinor: number):
+    "compatible" | "firmwareTooOld" | "firmwareTooNew";
+
+/**
+ * @brief Checks compatibility between the script and the JS SDK that the
+ *        firmware provides in a boolean fashion
+ * 
+ * @note You're looking at JS SDK v0.1
+ * 
+ * @param expectedMajor JS SDK major version expected by the script
+ * @param expectedMinor JS SDK minor version expected by the script
+ * @returns `true` if the two are compatible, `false` otherwise
+ * @version Added in JS SDK 0.1
+ */
+declare function isSdkCompatible(expectedMajor: number, expectedMinor: number): boolean;
+
+/**
+ * @brief Asks the user whether to continue executing the script if the versions
+ *        are not compatible. Does nothing if they are.
+ * 
+ * @note You're looking at JS SDK v0.1
+ * 
+ * @param expectedMajor JS SDK major version expected by the script
+ * @param expectedMinor JS SDK minor version expected by the script
+ * @version Added in JS SDK 0.1
+ */
+declare function checkSdkCompatibility(expectedMajor: number, expectedMinor: number): void | never;
+
+/**
+ * @brief Checks whether all of the specified extra features are supported by
+ *        the interpreter.
+ * @warning This function will return `false` if a queried feature is now
+ *          recognized as a baseline feature. For more info, consult the module
+ *          documentation.
+ * @param features Array of named features to query
+ */
+declare function doesSdkSupport(features: string[]): boolean;
+
+/**
+ * @brief Checks whether all of the specified extra features are supported by
+ *        the interpreter, asking the user if they want to continue running the
+ *        script if they're not.
+ * @warning This function will act as if the feature is not implemented for
+ *          features that are now recognized as baseline features. For more
+ *          info, consult the module documentation.
+ * @param features Array of named features to query
+ */
+declare function checkSdkFeatures(features: string[]): void | never;
+
+/**
+ * @brief Pauses JavaScript execution for a while
+ * @param ms How many milliseconds to pause the execution for
+ * @version Added in JS SDK 0.1
+ */
+declare function delay(ms: number): void;
+
+/**
+ * @brief Prints to the GUI console view
+ * @param args The arguments are converted to strings, concatenated without any
+ *             spaces in between and printed to the console view
+ * @version Added in JS SDK 0.1
+ */
+declare function print(...args: any[]): void;
+
+/**
+ * @brief Converts a number to a string
+ * @param value The number to convert to a string
+ * @param base Integer base (`2`...`16`), default: 10
+ * @version Added in JS SDK 0.1
+ */
+declare function toString(value: number, base?: number): string;
+
+/**
+ * @brief Reads a JS value from a file
+ * 
+ * Reads a file at the specified path, interprets it as a JS value and returns
+ * said value.
+ * 
+ * @param path The path to the file
+ * @version Added in JS SDK 0.1
+ */
+declare function load(path: string): any;
+
+/**
+ * @brief Loads a natively implemented module
+ * @param module The name of the module to load
+ * @version Added in JS SDK 0.1
+ */
+declare function require(module: string): any;
+
+/**
+ * @brief mJS Foreign Pointer type
+ * 
+ * JavaScript code cannot do anything with values of `RawPointer` type except
+ * acquire them from native code and pass them right back to other parts of
+ * native code. These values cannot be turned into something meaningful, nor can
+ * be they modified.
+ * 
+ * @version Added in JS SDK 0.1
+ */
+declare type RawPointer = symbol & { "__tag__": "raw_ptr" };
+// introducing a nominal type in a hacky way; the `__tag__` property doesn't really exist.
+
+/**
+ * @brief Holds raw bytes
+ * @version Added in JS SDK 0.1
+ */
+declare class ArrayBuffer {
+    /**
+     * @brief The pointer to the byte buffer
+     * @note Like other `RawPointer` values, this value is essentially useless
+     *       to JS code.
+     * @version Added in JS SDK 0.1
+     */
+    getPtr: RawPointer;
+    /**
+     * @brief The length of the buffer in bytes
+     * @version Added in JS SDK 0.1
+     */
+    byteLength: number;
+    /**
+     * @brief Creates an `ArrayBuffer` that contains a sub-part of the buffer
+     * @param start The index of the byte in the source buffer to be used as the
+     *              start for the new buffer
+     * @param end The index of the byte in the source buffer that follows the
+     *            byte to be used as the last byte for the new buffer
+     * @version Added in JS SDK 0.1
+     */
+    slice(start: number, end?: number): ArrayBuffer;
+}
+
+declare function ArrayBuffer(): ArrayBuffer;
+
+declare type ElementType = "u8" | "i8" | "u16" | "i16" | "u32" | "i32";
+
+declare class TypedArray<E extends ElementType> {
+    /**
+     * @brief The length of the buffer in bytes
+     * @version Added in JS SDK 0.1
+     */
+    byteLength: number;
+    /**
+     * @brief The length of the buffer in typed elements
+     * @version Added in JS SDK 0.1
+     */
+    length: number;
+    /**
+     * @brief The underlying `ArrayBuffer`
+     * @version Added in JS SDK 0.1
+     */
+    buffer: ArrayBuffer;
+}
+
+declare class Uint8Array extends TypedArray<"u8"> { }
+declare class Int8Array extends TypedArray<"i8"> { }
+declare class Uint16Array extends TypedArray<"u16"> { }
+declare class Int16Array extends TypedArray<"i16"> { }
+declare class Uint32Array extends TypedArray<"u32"> { }
+declare class Int32Array extends TypedArray<"i32"> { }
+
+declare function Uint8Array(data: ArrayBuffer | number | number[]): Uint8Array;
+declare function Int8Array(data: ArrayBuffer | number | number[]): Int8Array;
+declare function Uint16Array(data: ArrayBuffer | number | number[]): Uint16Array;
+declare function Int16Array(data: ArrayBuffer | number | number[]): Int16Array;
+declare function Uint32Array(data: ArrayBuffer | number | number[]): Uint32Array;
+declare function Int32Array(data: ArrayBuffer | number | number[]): Int32Array;
+
+declare const console: {
+    /**
+     * @brief Prints to the UART logs at the `[I]` level
+     * @param args The arguments are converted to strings, concatenated without any
+     *             spaces in between and printed to the logs
+     * @version Added in JS SDK 0.1
+     */
+    log(...args: any[]): void;
+    /**
+     * @brief Prints to the UART logs at the `[D]` level
+     * @param args The arguments are converted to strings, concatenated without any
+     *             spaces in between and printed to the logs
+     * @version Added in JS SDK 0.1
+     */
+    debug(...args: any[]): void;
+    /**
+     * @brief Prints to the UART logs at the `[W]` level
+     * @param args The arguments are converted to strings, concatenated without any
+     *             spaces in between and printed to the logs
+     * @version Added in JS SDK 0.1
+     */
+    warn(...args: any[]): void;
+    /**
+     * @brief Prints to the UART logs at the `[E]` level
+     * @param args The arguments are converted to strings, concatenated without any
+     *             spaces in between and printed to the logs
+     * @version Added in JS SDK 0.1
+     */
+    error(...args: any[]): void;
+};
+
+declare class Array<T> {
+    /**
+     * @brief Takes items out of the array
+     * 
+     * Removes elements from the array and returns them in a new array
+     * 
+     * @param start The index to start taking elements from
+     * @param deleteCount How many elements to take
+     * @returns The elements that were taken out of the original array as a new
+     *          array
+     * @version Added in JS SDK 0.1
+     */
+    splice(start: number, deleteCount: number): T[];
+    /**
+     * @brief Adds a value to the end of the array
+     * @param value The value to add
+     * @returns New length of the array
+     * @version Added in JS SDK 0.1
+     */
+    push(value: T): number;
+    /**
+     * @brief How many elements there are in the array
+     * @version Added in JS SDK 0.1
+     */
+    length: number;
+}
+
+declare class String {
+    /**
+     * @brief How many characters there are in the string
+     * @version Added in JS SDK 0.1
+     */
+    length: number;
+    /**
+     * @brief Returns the character code at an index in the string
+     * @param index The index to consult
+     * @version Added in JS SDK 0.1
+     */
+    charCodeAt(index: number): number;
+    /**
+     * See `charCodeAt`
+     * @version Added in JS SDK 0.1
+     */
+    at(index: number): number;
+}
+
+declare class Boolean { }
+
+declare class Function { }
+
+declare class Number { }
+
+declare class Object { }
+
+declare class RegExp { }
+
+declare interface IArguments { }
+
+declare type Partial<O extends object> = { [K in keyof O]?: O[K] };

applications/system/js_app/packages/fz-sdk/gpio/index.d.ts

@@ -1,5 +1,37 @@
+/**
+ * Module for accessing the GPIO (General Purpose Input/Output) ports
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gpio = require("gpio");
+ * ```
+ * 
+ * This module depends on the `event_loop` module, so it _must_ only be imported
+ * after `event_loop` is imported.
+ * 
+ * # Example
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gpio = require("gpio");
+ * 
+ * let led = gpio.get("pc3");
+ * led.init({ direction: "out", outMode: "push_pull" });
+ * 
+ * led.write(true);
+ * delay(1000);
+ * led.write(false);
+ * delay(1000);
+ * ```
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
 import type { Contract } from "../event_loop";
 
+/**
+ * @version Added in JS SDK 0.1
+ */
 export interface Mode {
     direction: "in" | "out";
     outMode?: "push_pull" | "open_drain";
@@ -8,31 +40,39 @@ export interface Mode {
     pull?: "up" | "down";
 }
 
+/**
+ * @version Added in JS SDK 0.1
+ */
 export interface Pin {
     /**
      * Configures a pin. This may be done several times.
      * @param mode Pin configuration object
+     * @version Added in JS SDK 0.1
      */
     init(mode: Mode): void;
     /**
      * Sets the output value of a pin if it's been configured with
      * `direction: "out"`.
      * @param value Logic value to output
+     * @version Added in JS SDK 0.1
      */
     write(value: boolean): void;
     /**
      * Gets the input value of a pin if it's been configured with
      * `direction: "in"`, but not `inMode: "analog"`.
+     * @version Added in JS SDK 0.1
      */
     read(): boolean;
     /**
      * Gets the input voltage of a pin in millivolts if it's been configured
      * with `direction: "in"` and `inMode: "analog"`
+     * @version Added in JS SDK 0.1
      */
-    read_analog(): number;
+    readAnalog(): number;
     /**
      * Returns an `event_loop` event that can be used to listen to interrupts,
      * as configured by `init`
+     * @version Added in JS SDK 0.1
      */
     interrupt(): Contract;
 }
@@ -41,5 +81,6 @@ export interface Pin {
  * Returns an object that can be used to manage a GPIO pin. For the list of
  * available pins, see https://docs.flipper.net/gpio-and-modules#miFsS
  * @param pin Pin name (e.g. `"PC3"`) or number (e.g. `7`)
+ * @version Added in JS SDK 0.1
  */
 export function get(pin: string | number): Pin;

applications/system/js_app/packages/fz-sdk/gui/dialog.d.ts

@@ -0,0 +1,45 @@
+/**
+ * Displays a dialog with up to three options.
+ * 
+ * <img src="../images/dialog.png" width="200" alt="Sample screenshot of the view" />
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * let dialogView = require("gui/dialog");
+ * ```
+ * 
+ * This module depends on the `gui` module, which in turn depends on the
+ * `event_loop` module, so they _must_ be imported in this order. It is also
+ * recommended to conceptualize these modules first before using this one.
+ * 
+ * # Example
+ * For an example refer to the `gui.js` example script.
+ * 
+ * # View props
+ *   - `header`: Text displayed in bold at the top of the screen
+ *   - `text`: Text displayed in the middle of the string
+ *   - `left`: Text for the left button
+ *   - `center`: Text for the center button
+ *   - `right`: Text for the right button
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+import type { View, ViewFactory } from ".";
+import type { Contract } from "../event_loop";
+
+type Props = {
+    header: string,
+    text: string,
+    left: string,
+    center: string,
+    right: string,
+}
+declare class Dialog extends View<Props> {
+    input: Contract<"left" | "center" | "right">;
+}
+declare class DialogFactory extends ViewFactory<Props, Dialog> { }
+declare const factory: DialogFactory;
+export = factory;

applications/system/js_app/packages/fz-sdk/gui/empty_screen.d.ts

@@ -0,0 +1,32 @@
+/**
+ * Displays nothing.
+ * 
+ * <img src="../images/empty.png" width="200" alt="Sample screenshot of the view" />
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * let emptyView = require("gui/empty_screen");
+ * ```
+ * 
+ * This module depends on the `gui` module, which in turn depends on the
+ * `event_loop` module, so they _must_ be imported in this order. It is also
+ * recommended to conceptualize these modules first before using this one.
+ * 
+ * # Example
+ * For an example refer to the GUI example.
+ * 
+ * # View props
+ * This view does not have any props.
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+import type { View, ViewFactory } from ".";
+
+type Props = {};
+declare class EmptyScreen extends View<Props> { }
+declare class EmptyScreenFactory extends ViewFactory<Props, EmptyScreen> { }
+declare const factory: EmptyScreenFactory;
+export = factory;

applications/system/js_app/packages/fz-sdk/gui/index.d.ts

@@ -0,0 +1,171 @@
+/**
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * ```
+ * 
+ * This module depends on the `event_loop` module, so it _must_ only be imported
+ * after `event_loop` is imported.
+ * 
+ * ## Conceptualizing GUI
+ * ### Event loop
+ * It is highly recommended to familiarize yourself with the event loop first
+ * before doing GUI-related things.
+ * 
+ * ### Canvas
+ * The canvas is just a drawing area with no abstractions over it. Drawing on
+ * the canvas directly (i.e. not through a viewport) is useful in case you want
+ * to implement a custom design element, but this is rather uncommon.
+ * 
+ * ### Viewport
+ * A viewport is a window into a rectangular portion of the canvas. Applications
+ * always access the canvas through a viewport.
+ * 
+ * ### View
+ * In Flipper's terminology, a "View" is a fullscreen design element that
+ * assumes control over the entire viewport and all input events. Different
+ * types of views are available (not all of which are unfortunately currently
+ * implemented in JS):
+ * | View                 | Has JS adapter?  |
+ * |----------------------|------------------|
+ * | `button_menu`        | ❌               |
+ * | `button_panel`       | ❌               |
+ * | `byte_input`         | ❌               |
+ * | `dialog_ex`          | ✅ (as `dialog`) |
+ * | `empty_screen`       | ✅               |
+ * | `file_browser`       | ❌               |
+ * | `loading`            | ✅               |
+ * | `menu`               | ❌               |
+ * | `number_input`       | ❌               |
+ * | `popup`              | ❌               |
+ * | `submenu`            | ✅               |
+ * | `text_box`           | ✅               |
+ * | `text_input`         | ✅               |
+ * | `variable_item_list` | ❌               |
+ * | `widget`             | ❌               |
+ * 
+ * In JS, each view has its own set of properties (or just "props"). The
+ * programmer can manipulate these properties in two ways:
+ *   - Instantiate a `View` using the `makeWith(props)` method, passing an
+ *     object with the initial properties
+ *   - Call `set(name, value)` to modify a property of an existing `View`
+ * 
+ * ### View Dispatcher
+ * The view dispatcher holds references to all the views that an application
+ * needs and switches between them as the application makes requests to do so.
+ * 
+ * ### Scene Manager
+ * The scene manager is an optional add-on to the view dispatcher that makes
+ * managing applications with complex navigation flows easier. It is currently
+ * inaccessible from JS.
+ * 
+ * ### Approaches
+ * In total, there are three different approaches that you may take when writing
+ * a GUI application:
+ * | Approach       | Use cases                                                                    | Available from JS |
+ * |----------------|------------------------------------------------------------------------------|-------------------|
+ * | ViewPort only  | Accessing the graphics API directly, without any of the nice UI abstractions | ❌                |
+ * | ViewDispatcher | Common UI elements that fit with the overall look of the system              | ✅                |
+ * | SceneManager   | Additional navigation flow management for complex applications               | ❌                |
+ * 
+ * # Example
+ * An example with three different views using the ViewDispatcher approach:
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * let loadingView = require("gui/loading");
+ * let submenuView = require("gui/submenu");
+ * let emptyView = require("gui/empty_screen");
+ * 
+ * // Common pattern: declare all the views in an object. This is absolutely not
+ * // required, but adds clarity to the script.
+ * let views = {
+ *     // the view dispatcher auto-✨magically✨ remembers views as they are created
+ *     loading: loadingView.make(),
+ *     empty: emptyView.make(),
+ *     demos: submenuView.makeWith({
+ *         items: [
+ *             "Hourglass screen",
+ *             "Empty screen",
+ *             "Exit app",
+ *         ],
+ *     }),
+ * };
+ * 
+ * // go to different screens depending on what was selected
+ * eventLoop.subscribe(views.demos.chosen, function (_sub, index, gui, eventLoop, views) {
+ *     if (index === 0) {
+ *         gui.viewDispatcher.switchTo(views.loading);
+ *     } else if (index === 1) {
+ *         gui.viewDispatcher.switchTo(views.empty);
+ *     } else if (index === 2) {
+ *         eventLoop.stop();
+ *     }
+ * }, gui, eventLoop, views);
+ * 
+ * // go to the demo chooser screen when the back key is pressed
+ * eventLoop.subscribe(gui.viewDispatcher.navigation, function (_sub, _, gui, views) {
+ *     gui.viewDispatcher.switchTo(views.demos);
+ * }, gui, views);
+ * 
+ * // run UI
+ * gui.viewDispatcher.switchTo(views.demos);
+ * eventLoop.run();
+ * ```
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+import type { Contract } from "../event_loop";
+
+type Properties = { [K: string]: any };
+
+export declare class View<Props extends Properties> {
+    set<P extends keyof Props>(property: P, value: Props[P]): void;
+}
+
+export declare class ViewFactory<Props extends Properties, V extends View<Props>> {
+    make(): V;
+    makeWith(initial: Partial<Props>): V;
+}
+
+/**
+ * @version Added in JS SDK 0.1
+ */
+declare class ViewDispatcher {
+    /**
+     * Event source for `sendCustom` events
+     * @version Added in JS SDK 0.1
+     */
+    custom: Contract<number>;
+    /**
+     * Event source for navigation events (back key presses)
+     * @version Added in JS SDK 0.1
+     */
+    navigation: Contract;
+    /**
+     * Sends a number to the custom event handler
+     * @param event number to send
+     * @version Added in JS SDK 0.1
+     */
+    sendCustom(event: number): void;
+    /**
+     * Switches to a view
+     * @param assoc View-ViewDispatcher association as returned by `add`
+     * @version Added in JS SDK 0.1
+     */
+    switchTo(assoc: View<any>): void;
+    /**
+     * Sends this ViewDispatcher to the front or back, above or below all other
+     * GUI viewports
+     * @param direction Either `"front"` or `"back"`
+     * @version Added in JS SDK 0.1
+     */
+    sendTo(direction: "front" | "back"): void;
+}
+
+/**
+ * @version Added in JS SDK 0.1
+ */
+export const viewDispatcher: ViewDispatcher;

applications/system/js_app/packages/fz-sdk/gui/loading.d.ts

@@ -0,0 +1,33 @@
+/**
+ * Displays an animated hourglass icon. Suppresses all `navigation` events,
+ * making it impossible for the user to exit the view by pressing the back key.
+ * 
+ * <img src="../images/loading.png" width="200" alt="Sample screenshot of the view" />
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * let loadingView = require("gui/loading");
+ * ```
+ * 
+ * This module depends on the `gui` module, which in turn depends on the
+ * `event_loop` module, so they _must_ be imported in this order. It is also
+ * recommended to conceptualize these modules first before using this one.
+ * 
+ * # Example
+ * For an example refer to the GUI example.
+ * 
+ * # View props
+ * This view does not have any props.
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+import type { View, ViewFactory } from ".";
+
+type Props = {};
+declare class Loading extends View<Props> { }
+declare class LoadingFactory extends ViewFactory<Props, Loading> { }
+declare const factory: LoadingFactory;
+export = factory;

applications/system/js_app/packages/fz-sdk/gui/submenu.d.ts

@@ -0,0 +1,39 @@
+/**
+ * Displays a scrollable list of clickable textual entries.
+ * 
+ * <img src="../images/submenu.png" width="200" alt="Sample screenshot of the view" />
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * let submenuView = require("gui/submenu");
+ * ```
+ * 
+ * This module depends on the `gui` module, which in turn depends on the
+ * `event_loop` module, so they _must_ be imported in this order. It is also
+ * recommended to conceptualize these modules first before using this one.
+ * 
+ * # Example
+ * For an example refer to the GUI example.
+ * 
+ * # View props
+ *   - `header`: Text displayed at the top of the screen in bold
+ *   - `items`: Array of selectable textual items
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+import type { View, ViewFactory } from ".";
+import type { Contract } from "../event_loop";
+
+type Props = {
+    header: string,
+    items: string[],
+};
+declare class Submenu extends View<Props> {
+    chosen: Contract<number>;
+}
+declare class SubmenuFactory extends ViewFactory<Props, Submenu> { }
+declare const factory: SubmenuFactory;
+export = factory;

applications/system/js_app/packages/fz-sdk/gui/text_box.d.ts

@@ -0,0 +1,41 @@
+/**
+ * Displays a scrollable read-only text field.
+ *
+ * <img src="text_box.png" width="200" alt="Sample screenshot of the view" />
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * let textBoxView = require("gui/text_box");
+ * ```
+ * 
+ * This module depends on the `gui` module, which in turn depends on the
+ * `event_loop` module, so they _must_ be imported in this order. It is also
+ * recommended to conceptualize these modules first before using this one.
+ * 
+ * # Example
+ * For an example refer to the `gui.js` example script.
+ * 
+ * # View props
+ *   - `text`: Text in the text box
+ *   - `font`: The font to display the text in (`"text"` or `"hex"`)
+ *   - `focus`: The initial focus of the text box (`"start"` or `"end"`)
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+import type { View, ViewFactory } from ".";
+import type { Contract } from "../event_loop";
+
+type Props = {
+    text: string,
+    font: "text" | "hex",
+    focus: "start" | "end",
+}
+declare class TextBox extends View<Props> {
+    chosen: Contract<number>;
+}
+declare class TextBoxFactory extends ViewFactory<Props, TextBox> { }
+declare const factory: TextBoxFactory;
+export = factory;

applications/system/js_app/packages/fz-sdk/gui/text_input.d.ts

@@ -0,0 +1,41 @@
+/**
+ * Displays a keyboard.
+ * 
+ * <img src="../images/text_input.png" width="200" alt="Sample screenshot of the view" />
+ * 
+ * ```js
+ * let eventLoop = require("event_loop");
+ * let gui = require("gui");
+ * let textInputView = require("gui/text_input");
+ * ```
+ * 
+ * This module depends on the `gui` module, which in turn depends on the
+ * `event_loop` module, so they _must_ be imported in this order. It is also
+ * recommended to conceptualize these modules first before using this one.
+ * 
+ * # Example
+ * For an example refer to the `gui.js` example script.
+ * 
+ * # View props
+ *   - `header`: Text displayed at the top of the screen
+ *   - `minLength`: Minimum allowed text length
+ *   - `maxLength`: Maximum allowed text length
+ * 
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+import type { View, ViewFactory } from ".";
+import type { Contract } from "../event_loop";
+
+type Props = {
+    header: string,
+    minLength: number,
+    maxLength: number,
+}
+declare class TextInput extends View<Props> {
+    input: Contract<string>;
+}
+declare class TextInputFactory extends ViewFactory<Props, TextInput> { }
+declare const factory: TextInputFactory;
+export = factory;

applications/system/js_app/packages/fz-sdk/math/index.d.ts

@@ -1,24 +1,54 @@
+/**
+ * Math operations
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
+/** @version Added in JS SDK 0.1 */
 export function abs(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function acos(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function acosh(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function asin(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function asinh(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function atan(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function atan2(a: number, b: number): number;
+/** @version Added in JS SDK 0.1 */
 export function atanh(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function cbrt(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function ceil(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function clz32(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function cos(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function exp(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function floor(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function max(n: number, m: number): number;
+/** @version Added in JS SDK 0.1 */
 export function min(n: number, m: number): number;
+/** @version Added in JS SDK 0.1 */
 export function pow(n: number, m: number): number;
+/** @version Added in JS SDK 0.1 */
 export function random(): number;
+/** @version Added in JS SDK 0.1 */
 export function sign(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function sin(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function sqrt(n: number): number;
+/** @version Added in JS SDK 0.1 */
 export function trunc(n: number): number;
+/** @version Added in JS SDK 0.1 */
 declare const PI: number;
+/** @version Added in JS SDK 0.1 */
 declare const EPSILON: number;

applications/system/js_app/packages/fz-sdk/notification/index.d.ts

@@ -1,6 +1,13 @@
+/**
+ * Module for using the color LED and vibration motor
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
 /**
  * @brief Signals success to the user via the color LED, speaker and vibration
  *        motor
+ * @version Added in JS SDK 0.1
  */
 export declare function success(): void;
 
@@ -10,11 +17,15 @@ export declare function success(): void;
  */
 export declare function error(): void;
 
+/**
+ * @version Added in JS SDK 0.1
+ */
 export type Color = "red" | "green" | "blue" | "yellow" | "cyan" | "magenta";
 
 /**
  * @brief Displays a basic color on the color LED
  * @param color The color to display, see `Color`
  * @param duration The duration, either `"short"` (10ms) or `"long"` (100ms)
+ * @version Added in JS SDK 0.1
  */
 export declare function blink(color: Color, duration: "short" | "long"): void;

applications/system/js_app/packages/fz-sdk/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "@flipperdevices/fz-sdk",
+  "version": "0.1.0",
+  "description": "Type declarations and documentation for native JS modules available on Flipper Zero",
+  "keywords": [
+    "flipper",
+    "flipper zero",
+    "framework"
+  ],
+  "author": "Flipper Devices",
+  "license": "GPL-3.0-only",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/flipperdevices/flipperzero-firmware.git",
+    "directory": "applications/system/js_app/packages/fz-sdk"
+  },
+  "type": "module",
+  "devDependencies": {
+    "esbuild": "^0.24.0",
+    "esbuild-plugin-tsc": "^0.4.0",
+    "json5": "^2.2.3",
+    "typedoc": "^0.26.10",
+    "typedoc-material-theme": "^1.1.0"
+  },
+  "dependencies": {
+    "prompts": "^2.4.2",
+    "serialport": "^12.0.0"
+  }
+}

applications/system/js_app/packages/fz-sdk/pnpm-lock.yaml

@@ -0,0 +1,896 @@
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+
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+
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+  '@material/material-color-utilities@0.2.7': {}
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+    dependencies:
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+      debug: 4.3.4
+    transitivePeerDependencies:
+      - supports-color
+
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+  '@shikijs/types@1.22.0':
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+      '@types/mdast': 4.0.4
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+  zwitch@2.0.4: {}

applications/system/js_app/packages/fz-sdk/sdk.js

@@ -0,0 +1,176 @@
+#!/usr/bin/env node
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { SerialPort } from "serialport";
+import prompts from "prompts";
+import esbuild from "esbuild";
+import json5 from "json5";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+async function build(config) {
+    await esbuild.build({
+        entryPoints: ["./dist/index.js"],
+        outfile: config.output,
+        tsconfig: "./tsconfig.json",
+        format: "cjs",
+        bundle: true,
+        minify: config.minify,
+        external: [
+            "@flipperdevices/fz-sdk/*"
+        ],
+        supported: {
+            "array-spread": false,
+            "arrow": false,
+            "async-await": false,
+            "async-generator": false,
+            "bigint": false,
+            "class": false,
+            "const-and-let": true,
+            "decorators": false,
+            "default-argument": false,
+            "destructuring": false,
+            "dynamic-import": false,
+            "exponent-operator": false,
+            "export-star-as": false,
+            "for-await": false,
+            "for-of": false,
+            "function-name-configurable": false,
+            "function-or-class-property-access": false,
+            "generator": false,
+            "hashbang": false,
+            "import-assertions": false,
+            "import-meta": false,
+            "inline-script": false,
+            "logical-assignment": false,
+            "nested-rest-binding": false,
+            "new-target": false,
+            "node-colon-prefix-import": false,
+            "node-colon-prefix-require": false,
+            "nullish-coalescing": false,
+            "object-accessors": false,
+            "object-extensions": false,
+            "object-rest-spread": false,
+            "optional-catch-binding": false,
+            "optional-chain": false,
+            "regexp-dot-all-flag": false,
+            "regexp-lookbehind-assertions": false,
+            "regexp-match-indices": false,
+            "regexp-named-capture-groups": false,
+            "regexp-set-notation": false,
+            "regexp-sticky-and-unicode-flags": false,
+            "regexp-unicode-property-escapes": false,
+            "rest-argument": false,
+            "template-literal": false,
+            "top-level-await": false,
+            "typeof-exotic-object-is-object": false,
+            "unicode-escapes": false,
+            "using": false,
+        },
+    });
+
+    let outContents = fs.readFileSync(config.output, "utf8");
+    outContents = "let exports = {};\n" + outContents;
+
+    if (config.enforceSdkVersion) {
+        const version = json5.parse(fs.readFileSync(path.join(__dirname, "package.json"), "utf8")).version;
+        let [major, minor, _] = version.split(".");
+        outContents = `checkSdkCompatibility(${major}, ${minor});\n${outContents}`;
+    }
+
+    fs.writeFileSync(config.output, outContents);
+}
+
+async function upload(config) {
+    const appFile = fs.readFileSync(config.input, "utf8");
+    const flippers = (await SerialPort.list()).filter(x => x.serialNumber?.startsWith("flip_"));
+
+    if (!flippers) {
+        console.error("No Flippers found");
+        process.exit(1);
+    }
+
+    let portPath = flippers[0].path;
+    if (flippers.length > 1) {
+        port = (await prompts([{
+            type: "select",
+            name: "port",
+            message: "Select Flipper to run the app on",
+            choices: flippers.map(x => ({ title: x.serialNumber.replace("flip_", ""), value: x.path })),
+        }])).port;
+    }
+
+    console.log(`Connecting to Flipper at ${portPath}`);
+    let port = new SerialPort({ path: portPath, baudRate: 230400 });
+    let received = "";
+    let lastMatch = 0;
+    async function waitFor(string, timeoutMs) {
+        return new Promise((resolve, _reject) => {
+            let timeout = undefined;
+            if (timeoutMs) {
+                timeout = setTimeout(() => {
+                    console.error("Error: timeout");
+                    process.exit(1);
+                }, timeoutMs);
+            }
+            setInterval(() => {
+                let idx = received.indexOf(string, lastMatch);
+                if (idx !== -1) {
+                    lastMatch = idx;
+                    if (timeoutMs)
+                        clearTimeout(timeout);
+                    resolve();
+                }
+            }, 50);
+        });
+    }
+    port.on("data", (data) => {
+        received += data.toString();
+    });
+
+    await waitFor(">: ", 1000);
+    console.log("Uploading application file");
+    port.write(`storage remove ${config.output}\x0d`);
+    port.drain();
+    await waitFor(">: ", 1000);
+    port.write(`storage write_chunk ${config.output} ${appFile.length}\x0d`);
+    await waitFor("Ready", 1000);
+    port.write(appFile);
+    port.drain();
+    await waitFor(">: ", 1000);
+
+    console.log("Launching application");
+    port.write(`js ${config.output}\x0d`);
+    port.drain();
+
+    await waitFor("Running", 1000);
+    process.stdout.write(received.slice(lastMatch));
+    port.on("data", (data) => {
+        process.stdout.write(data.toString());
+    });
+    process.on("exit", () => {
+        port.write("\x03");
+    });
+
+    await waitFor("Script done!", 0);
+    process.exit(0);
+}
+
+(async () => {
+    const commands = {
+        "build": build,
+        "upload": upload,
+    };
+
+    const config = json5.parse(fs.readFileSync("./fz-sdk.config.json5", "utf8"));
+    const command = process.argv[2];
+
+    if (!Object.keys(commands).includes(command)) {
+        console.error(`Unknown command ${command}. Supported: ${Object.keys(commands).join(", ")}`);
+        process.exit(1);
+    }
+
+    await commands[command](config[command]);
+})();

applications/system/js_app/packages/fz-sdk/serial/index.d.ts

@@ -1,7 +1,14 @@
+/**
+ * Module for accessing the serial port
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
 /**
  * @brief Initializes the serial port
  * @param port The port to initialize (`"lpuart"` or `"start"`)
  * @param baudRate 
+ * @version Added in JS SDK 0.1
  */
 export declare function setup(port: "lpuart" | "usart", baudRate: number): void;
 
@@ -13,6 +20,7 @@ export declare function setup(port: "lpuart" | "usart", baudRate: number): void;
  *                - Arrays of numbers will get sent as a sequence of bytes.
  *                - `ArrayBuffer`s and `TypedArray`s will be sent as a sequence
  *                  of bytes.
+ * @version Added in JS SDK 0.1
  */
 export declare function write<E extends ElementType>(value: string | number | number[] | ArrayBuffer | TypedArray<E>): void;
 
@@ -24,6 +32,7 @@ export declare function write<E extends ElementType>(value: string | number | nu
  *                unset, the function will wait forever.
  * @returns The received data interpreted as ASCII, or `undefined` if 0 bytes
  *          were read.
+ * @version Added in JS SDK 0.1
  */
 export declare function read(length: number, timeout?: number): string | undefined;
 
@@ -39,6 +48,7 @@ export declare function read(length: number, timeout?: number): string | undefin
  *                applies to characters, not entire strings.
  * @returns The received data interpreted as ASCII, or `undefined` if 0 bytes
  *          were read.
+ * @version Added in JS SDK 0.1
  */
 export declare function readln(timeout?: number): string;
 
@@ -50,6 +60,7 @@ export declare function readln(timeout?: number): string;
  *                unset, the function will wait forever.
  * @returns The received data as an ArrayBuffer, or `undefined` if 0 bytes were
  *          read.
+ * @version Added in JS SDK 0.1
  */
 export declare function readBytes(length: number, timeout?: number): ArrayBuffer;
 
@@ -73,5 +84,6 @@ export declare function readBytes(length: number, timeout?: number): ArrayBuffer
  * @returns The index of the matched pattern if multiple were provided, or 0 if
  *          only one was provided and it matched, or `undefined` if none of the
  *          patterns matched.
+ * @version Added in JS SDK 0.1
  */
 export declare function expect(patterns: string | number[] | string[] | number[][], timeout?: number): number | undefined;

applications/system/js_app/packages/fz-sdk/storage/index.d.ts

@@ -1,8 +1,15 @@
+/**
+ * Module for accessing the filesystem
+ * @version Added in JS SDK 0.1
+ * @module
+ */
+
 /**
  * File readability mode:
  *   - `"r"`: read-only
  *   - `"w"`: write-only
  *   - `"rw"`: read-write
+ * @version Added in JS SDK 0.1
  */
 export type AccessMode = "r" | "w" | "rw";
 
@@ -13,53 +20,78 @@ export type AccessMode = "r" | "w" | "rw";
  *   - `"open_append"`: open file and set r/w pointer to EOF, or create a new one if it doesn't exist
  *   - `"create_new"`: create new file or fail if it exists
  *   - `"create_always"`: truncate and open file, or create a new empty one if it doesn't exist
+ * @version Added in JS SDK 0.1
  */
 export type OpenMode = "open_existing" | "open_always" | "open_append" | "create_new" | "create_always";
 
-/** Standard UNIX timestamp */
+/**
+ * Standard UNIX timestamp
+ * @version Added in JS SDK 0.1
+ */
 export type Timestamp = number;
 
-/** File information structure */
+/**
+ * File information structure
+ * @version Added in JS SDK 0.1
+ */
 export declare class FileInfo {
     /**
      * Full path (e.g. "/ext/test", returned by `stat`) or file name
      * (e.g. "test", returned by `readDirectory`)
+     * @version Added in JS SDK 0.1
      */
     path: string;
     /**
      * Is the file a directory?
+     * @version Added in JS SDK 0.1
      */
     isDirectory: boolean;
     /**
      * File size in bytes, or 0 in the case of directories
+     * @version Added in JS SDK 0.1
      */
     size: number;
     /**
      * Time of last access as a UNIX timestamp
+     * @version Added in JS SDK 0.1
      */
     accessTime: Timestamp;
 }
 
-/** Filesystem information structure */
+/**
+ * Filesystem information structure
+ * @version Added in JS SDK 0.1
+ */
 export declare class FsInfo {
-    /** Total size of the filesystem, in bytes */
+    /**
+     * Total size of the filesystem, in bytes
+     * @version Added in JS SDK 0.1
+     */
     totalSpace: number;
-    /** Free space in the filesystem, in bytes */
+    /**
+     * Free space in the filesystem, in bytes
+     * @version Added in JS SDK 0.1
+     */
     freeSpace: number;
 }
 
 // file operations
 
-/** File class */
+/**
+ * File class
+ * @version Added in JS SDK 0.1
+ */
 export declare class File {
     /**
      * Closes the file. After this method is called, all other operations
      * related to this file become unavailable.
      * @returns `true` on success, `false` on failure
+     * @version Added in JS SDK 0.1
      */
     close(): boolean;
     /**
      * Is the file currently open?
+     * @version Added in JS SDK 0.1
      */
     isOpen(): boolean;
     /**
@@ -70,6 +102,7 @@ export declare class File {
      * @returns an `ArrayBuf` if the mode is `"binary"`, a `string` if the mode
      *          is `ascii`. The number of bytes that was actually read may be
      *          fewer than requested.
+     * @version Added in JS SDK 0.1
      */
     read<T extends ArrayBuffer | string>(mode: T extends ArrayBuffer ? "binary" : "ascii", bytes: number): T;
     /**
@@ -77,36 +110,43 @@ export declare class File {
      * @param data The data to write: a string that will be ASCII-encoded, or an
      *             ArrayBuf
      * @returns the amount of bytes that was actually written
+     * @version Added in JS SDK 0.1
      */
     write(data: ArrayBuffer | string): number;
     /**
      * Moves the R/W pointer forward
      * @param bytes How many bytes to move the pointer forward by
      * @returns `true` on success, `false` on failure
+     * @version Added in JS SDK 0.1
      */
     seekRelative(bytes: number): boolean;
     /**
      * Moves the R/W pointer to an absolute position inside the file
      * @param bytes The position inside the file
      * @returns `true` on success, `false` on failure
+     * @version Added in JS SDK 0.1
      */
     seekAbsolute(bytes: number): boolean;
     /**
      * Gets the absolute position of the R/W pointer in bytes
+     * @version Added in JS SDK 0.1
      */
     tell(): number;
     /**
      * Discards the data after the current position of the R/W pointer in a file
      * opened in either write-only or read-write mode.
      * @returns `true` on success, `false` on failure
+     * @version Added in JS SDK 0.1
      */
     truncate(): boolean;
     /**
      * Reads the total size of the file in bytes
+     * @version Added in JS SDK 0.1
      */
     size(): number;
     /**
      * Detects whether the R/W pointer has reached the end of the file
+     * @version Added in JS SDK 0.1
      */
     eof(): boolean;
     /**
@@ -115,6 +155,7 @@ export declare class File {
      * @param dest The file to copy the bytes into
      * @param bytes The number of bytes to copy
      * @returns `true` on success, `false` on failure
+     * @version Added in JS SDK 0.1
      */
     copyTo(dest: File, bytes: number): boolean;
 }
@@ -126,12 +167,14 @@ export declare class File {
  * @param openMode `"open_existing"`, `"open_always"`, `"open_append"`,
  *                 `"create_new"` or `"create_always"`; see `OpenMode`
  * @returns a `File` on success, or `undefined` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function openFile(path: string, accessMode: AccessMode, openMode: OpenMode): File | undefined;
 /**
  * Detects whether a file exists
  * @param path The path to the file
  * @returns `true` on success, `false` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function fileExists(path: string): boolean;
 
@@ -142,17 +185,20 @@ export declare function fileExists(path: string): boolean;
  * @param path The path to the directory
  * @returns Array of `FileInfo` structures with directory entries,
  *          or `undefined` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function readDirectory(path: string): FileInfo[] | undefined;
 /**
  * Detects whether a directory exists
  * @param path The path to the directory
+ * @version Added in JS SDK 0.1
  */
 export declare function directoryExists(path: string): boolean;
 /**
  * Creates an empty directory
  * @param path The path to the new directory
  * @returns `true` on success, `false` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function makeDirectory(path: string): boolean;
 
@@ -161,24 +207,28 @@ export declare function makeDirectory(path: string): boolean;
 /**
  * Detects whether a file or a directory exists
  * @param path The path to the file or directory
+ * @version Added in JS SDK 0.1
  */
 export declare function fileOrDirExists(path: string): boolean;
 /**
  * Acquires metadata about a file or directory
  * @param path The path to the file or directory
  * @returns A `FileInfo` structure or `undefined` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function stat(path: string): FileInfo | undefined;
 /**
  * Removes a file or an empty directory
  * @param path The path to the file or directory
  * @returns `true` on success, `false` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function remove(path: string): boolean;
 /**
  * Removes a file or recursively removes a possibly non-empty directory
  * @param path The path to the file or directory
  * @returns `true` on success, `false` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function rmrf(path: string): boolean;
 /**
@@ -187,6 +237,7 @@ export declare function rmrf(path: string): boolean;
  * @param newPath The new path that the file or directory will become accessible
  *                under
  * @returns `true` on success, `false` on failure
+ * @version Added in JS SDK 0.1
  */
 export declare function rename(oldPath: string, newPath: string): boolean;
 /**
@@ -194,11 +245,13 @@ export declare function rename(oldPath: string, newPath: string): boolean;
  * @param oldPath The original path to the file or directory
  * @param newPath The new path that the copy of the file or directory will be
  *                accessible under
+ * @version Added in JS SDK 0.1
  */
 export declare function copy(oldPath: string, newPath: string): boolean;
 /**
  * Fetches generic information about a filesystem
  * @param filesystem The path to the filesystem (e.g. `"/ext"` or `"/int"`)
+ * @version Added in JS SDK 0.1
  */
 export declare function fsInfo(filesystem: string): FsInfo | undefined;
 /**
@@ -218,6 +271,7 @@ export declare function fsInfo(filesystem: string): FsInfo | undefined;
  * @param maxLen The maximum length of the filename with the numeric suffix
  * @returns The base of the filename with the next available numeric suffix,
  *          without the extension or the base directory.
+ * @version Added in JS SDK 0.1
  */
 export declare function nextAvailableFilename(dirPath: string, fileName: string, fileExt: string, maxLen: number): string;
 
@@ -226,6 +280,7 @@ export declare function nextAvailableFilename(dirPath: string, fileName: string,
 /**
  * Determines whether the two paths are equivalent. Respects filesystem-defined
  * path equivalence rules.
+ * @version Added in JS SDK 0.1
  */
 export declare function arePathsEqual(path1: string, path2: string): boolean;
 /**
@@ -233,5 +288,6 @@ export declare function arePathsEqual(path1: string, path2: string): boolean;
  * filesystem-defined path equivalence rules.
  * @param parentPath The parent path
  * @param childPath The child path
+ * @version Added in JS SDK 0.1
  */
 export declare function isSubpathOf(parentPath: string, childPath: string): boolean;

applications/system/js_app/packages/fz-sdk/tests/index.d.ts

@@ -1,6 +1,8 @@
 /**
  * Unit test module. Only available if the firmware has been configured with
  * `FIRMWARE_APP_SET=unit_tests`.
+ * @version Added in JS SDK 0.1
+ * @module
  */
 
 export function fail(message: string): never;

applications/system/js_app/packages/fz-sdk/tsconfig.json

@@ -0,0 +1,13 @@
+{
+    "compilerOptions": {
+        "checkJs": true,
+        "module": "CommonJS",
+        "noLib": true,
+    },
+    "include": [
+        "./**/*.d.ts"
+    ],
+    "exclude": [
+        "node_modules",
+    ]
+}

applications/system/js_app/packages/fz-sdk/typedoc.json

@@ -0,0 +1,19 @@
+{
+    "$schema": "https://typedoc.org/schema.json",
+    "name": "Flipper Zero JS API",
+    "excludePrivate": true,
+    "entryPointStrategy": "expand",
+    "entryPoints": [
+        ".",
+    ],
+    "exclude": [
+        "node_modules"
+    ],
+    "cleanOutputDir": true,
+    "out": "./docs",
+    "plugin": [
+        "typedoc-material-theme",
+    ],
+    "readme": "./docs_readme.md",
+    "themeColor": "#ff8200",
+}

applications/system/js_app/types/event_loop/index.d.ts

@@ -1,70 +0,0 @@
-type Lit = undefined | null | {};
-
-/**
- * Subscription control interface
- */
-export interface Subscription {
-    /**
-     * Cancels the subscription, preventing any future events managed by the
-     * subscription from firing
-     */
-    cancel(): void;
-}
-
-/**
- * Opaque event source identifier
- */
-export type Contract<Item = undefined> = symbol;
-
-/**
- * A callback can be assigned to an event loop to listen to an event. It may
- * return an array with values that will be passed to it as arguments the next
- * time that it is called. The first argument is always the subscription
- * manager, and the second argument is always the item that trigged the event.
- * The type of the item is defined by the event source.
- */
-export type Callback<Item, Args extends Lit[]> = (subscription: Subscription, item: Item, ...args: Args) => Args | undefined | void;
-
-/**
- * Subscribes a callback to an event
- * @param contract Event identifier
- * @param callback Function to call when the event is triggered
- * @param args Initial arguments passed to the callback
- */
-export function subscribe<Item, Args extends Lit[]>(contract: Contract<Item>, callback: Callback<Item, Args>, ...args: Args): Subscription;
-/**
- * Runs the event loop until it is stopped (potentially never)
- */
-export function run(): void | never;
-/**
- * Stops the event loop
- */
-export function stop(): void;
-
-/**
- * Creates a timer event that can be subscribed to just like any other event
- * @param mode Either `"oneshot"` or `"periodic"`
- * @param interval Timer interval in milliseconds
- */
-export function timer(mode: "oneshot" | "periodic", interval: number): Contract;
-
-/**
- * Message queue
- */
-export interface Queue<T> {
-    /**
-     * Message event
-     */
-    input: Contract<T>;
-    /**
-     * Sends a message to the queue
-     * @param message message to send
-     */
-    send(message: T): void;
-}
-
-/**
- * Creates a message queue
- * @param length maximum queue capacity
- */
-export function queue<T>(length: number): Queue<T>;

applications/system/js_app/types/flipper/index.d.ts

@@ -1,14 +0,0 @@
-/**
- * @brief Returns the device model
- */
-export declare function getModel(): string;
-
-/**
- * @brief Returns the name of the virtual dolphin
- */
-export declare function getName(): string;
-
-/**
- * @brief Returns the battery charge percentage
- */
-export declare function getBatteryCharge(): number;

applications/system/js_app/types/global.d.ts

@@ -1,178 +0,0 @@
-/**
- * @brief Pauses JavaScript execution for a while
- * @param ms How many milliseconds to pause the execution for
- */
-declare function delay(ms: number): void;
-
-/**
- * @brief Prints to the GUI console view
- * @param args The arguments are converted to strings, concatenated without any
- *             spaces in between and printed to the console view
- */
-declare function print(...args: any[]): void;
-
-/**
- * @brief Converts a number to a string
- * @param value The number to convert to a string
- * @param base Integer base (`2`...`16`), default: 16
- */
-declare function toString(value: number, base?: number): string;
-
-/**
- * @brief Reads a JS value from a file
- * 
- * Reads a file at the specified path, interprets it as a JS value and returns
- * said value.
- * 
- * @param path The path to the file
- */
-declare function load(path: string): any;
-
-/**
- * @brief mJS Foreign Pointer type
- * 
- * JavaScript code cannot do anything with values of `RawPointer` type except
- * acquire them from native code and pass them right back to other parts of
- * native code. These values cannot be turned into something meaningful, nor can
- * be they modified.
- */
-declare type RawPointer = symbol & { "__tag__": "raw_ptr" };
-// introducing a nominal type in a hacky way; the `__tag__` property doesn't really exist.
-
-/**
- * @brief Holds raw bytes
- */
-declare class ArrayBuffer {
-    /**
-     * @brief The pointer to the byte buffer
-     * @note Like other `RawPointer` values, this value is essentially useless
-     *       to JS code.
-     */
-    getPtr: RawPointer;
-    /**
-     * @brief The length of the buffer in bytes
-     */
-    byteLength: number;
-    /**
-     * @brief Creates an `ArrayBuffer` that contains a sub-part of the buffer
-     * @param start The index of the byte in the source buffer to be used as the
-     *              start for the new buffer
-     * @param end The index of the byte in the source buffer that follows the
-     *            byte to be used as the last byte for the new buffer
-     */
-    slice(start: number, end?: number): ArrayBuffer;
-}
-
-declare function ArrayBuffer(): ArrayBuffer;
-
-declare type ElementType = "u8" | "i8" | "u16" | "i16" | "u32" | "i32";
-
-declare class TypedArray<E extends ElementType> {
-    /**
-     * @brief The length of the buffer in bytes
-     */
-    byteLength: number;
-    /**
-     * @brief The length of the buffer in typed elements
-     */
-    length: number;
-    /**
-     * @brief The underlying `ArrayBuffer`
-     */
-    buffer: ArrayBuffer;
-}
-
-declare class Uint8Array extends TypedArray<"u8"> { }
-declare class Int8Array extends TypedArray<"i8"> { }
-declare class Uint16Array extends TypedArray<"u16"> { }
-declare class Int16Array extends TypedArray<"i16"> { }
-declare class Uint32Array extends TypedArray<"u32"> { }
-declare class Int32Array extends TypedArray<"i32"> { }
-
-declare function Uint8Array(data: ArrayBuffer | number | number[]): Uint8Array;
-declare function Int8Array(data: ArrayBuffer | number | number[]): Int8Array;
-declare function Uint16Array(data: ArrayBuffer | number | number[]): Uint16Array;
-declare function Int16Array(data: ArrayBuffer | number | number[]): Int16Array;
-declare function Uint32Array(data: ArrayBuffer | number | number[]): Uint32Array;
-declare function Int32Array(data: ArrayBuffer | number | number[]): Int32Array;
-
-declare const console: {
-    /**
-     * @brief Prints to the UART logs at the `[I]` level
-     * @param args The arguments are converted to strings, concatenated without any
-     *             spaces in between and printed to the logs
-     */
-    log(...args: any[]): void;
-    /**
-     * @brief Prints to the UART logs at the `[D]` level
-     * @param args The arguments are converted to strings, concatenated without any
-     *             spaces in between and printed to the logs
-     */
-    debug(...args: any[]): void;
-    /**
-     * @brief Prints to the UART logs at the `[W]` level
-     * @param args The arguments are converted to strings, concatenated without any
-     *             spaces in between and printed to the logs
-     */
-    warn(...args: any[]): void;
-    /**
-     * @brief Prints to the UART logs at the `[E]` level
-     * @param args The arguments are converted to strings, concatenated without any
-     *             spaces in between and printed to the logs
-     */
-    error(...args: any[]): void;
-};
-
-declare class Array<T> {
-    /**
-     * @brief Takes items out of the array
-     * 
-     * Removes elements from the array and returns them in a new array
-     * 
-     * @param start The index to start taking elements from
-     * @param deleteCount How many elements to take
-     * @returns The elements that were taken out of the original array as a new
-     *          array
-     */
-    splice(start: number, deleteCount: number): T[];
-    /**
-     * @brief Adds a value to the end of the array
-     * @param value The value to add
-     * @returns New length of the array
-     */
-    push(value: T): number;
-    /**
-     * @brief How many elements there are in the array
-     */
-    length: number;
-}
-
-declare class String {
-    /**
-     * @brief How many characters there are in the string
-     */
-    length: number;
-    /**
-     * @brief Returns the character code at an index in the string
-     * @param index The index to consult
-     */
-    charCodeAt(index: number): number;
-    /**
-     * See `charCodeAt`
-     */
-    at(index: number): number;
-}
-
-declare class Boolean { }
-
-declare class Function { }
-
-declare class Number { }
-
-declare class Object { }
-
-declare class RegExp { }
-
-declare interface IArguments { }
-
-declare type Partial<O extends object> = { [K in keyof O]?: O[K] };

applications/system/js_app/types/gui/dialog.d.ts

@@ -1,16 +0,0 @@
-import type { View, ViewFactory } from ".";
-import type { Contract } from "../event_loop";
-
-type Props = {
-    header: string,
-    text: string,
-    left: string,
-    center: string,
-    right: string,
-}
-declare class Dialog extends View<Props> {
-    input: Contract<"left" | "center" | "right">;
-}
-declare class DialogFactory extends ViewFactory<Props, Dialog> { }
-declare const factory: DialogFactory;
-export = factory;

applications/system/js_app/types/gui/empty_screen.d.ts

@@ -1,7 +0,0 @@
-import type { View, ViewFactory } from ".";
-
-type Props = {};
-declare class EmptyScreen extends View<Props> { }
-declare class EmptyScreenFactory extends ViewFactory<Props, EmptyScreen> { }
-declare const factory: EmptyScreenFactory;
-export = factory;

applications/system/js_app/types/gui/index.d.ts

@@ -1,41 +0,0 @@
-import type { Contract } from "../event_loop";
-
-type Properties = { [K: string]: any };
-
-export declare class View<Props extends Properties> {
-    set<P extends keyof Props>(property: P, value: Props[P]): void;
-}
-
-export declare class ViewFactory<Props extends Properties, V extends View<Props>> {
-    make(): V;
-    makeWith(initial: Partial<Props>): V;
-}
-
-declare class ViewDispatcher {
-    /**
-     * Event source for `sendCustom` events
-     */
-    custom: Contract<number>;
-    /**
-     * Event source for navigation events (back key presses)
-     */
-    navigation: Contract;
-    /**
-     * Sends a number to the custom event handler
-     * @param event number to send
-     */
-    sendCustom(event: number): void;
-    /**
-     * Switches to a view
-     * @param assoc View-ViewDispatcher association as returned by `add`
-     */
-    switchTo(assoc: View<any>): void;
-    /**
-     * Sends this ViewDispatcher to the front or back, above or below all other
-     * GUI viewports
-     * @param direction Either `"front"` or `"back"`
-     */
-    sendTo(direction: "front" | "back"): void;
-}
-
-export const viewDispatcher: ViewDispatcher;

applications/system/js_app/types/gui/loading.d.ts

@@ -1,7 +0,0 @@
-import type { View, ViewFactory } from ".";
-
-type Props = {};
-declare class Loading extends View<Props> { }
-declare class LoadingFactory extends ViewFactory<Props, Loading> { }
-declare const factory: LoadingFactory;
-export = factory;

applications/system/js_app/types/gui/submenu.d.ts

@@ -1,13 +0,0 @@
-import type { View, ViewFactory } from ".";
-import type { Contract } from "../event_loop";
-
-type Props = {
-    header: string,
-    items: string[],
-};
-declare class Submenu extends View<Props> {
-    chosen: Contract<number>;
-}
-declare class SubmenuFactory extends ViewFactory<Props, Submenu> { }
-declare const factory: SubmenuFactory;
-export = factory;

applications/system/js_app/types/gui/text_box.d.ts

@@ -1,14 +0,0 @@
-import type { View, ViewFactory } from ".";
-import type { Contract } from "../event_loop";
-
-type Props = {
-    text: string,
-    font: "text" | "hex",
-    focus: "start" | "end",
-}
-declare class TextBox extends View<Props> {
-    chosen: Contract<number>;
-}
-declare class TextBoxFactory extends ViewFactory<Props, TextBox> { }
-declare const factory: TextBoxFactory;
-export = factory;

applications/system/js_app/types/gui/text_input.d.ts

@@ -1,14 +0,0 @@
-import type { View, ViewFactory } from ".";
-import type { Contract } from "../event_loop";
-
-type Props = {
-    header: string,
-    minLength: number,
-    maxLength: number,
-}
-declare class TextInput extends View<Props> {
-    input: Contract<string>;
-}
-declare class TextInputFactory extends ViewFactory<Props, TextInput> { }
-declare const factory: TextInputFactory;
-export = factory;

documentation/js/js_gpio.md

@@ -61,7 +61,7 @@ Reads a digital value from a pin configured with `direction: "in"` and any
 #### Returns
 Boolean logic level
 
-### `Pin.read_analog()`
+### `Pin.readAnalog()`
 Reads an analog voltage level in millivolts from a pin configured with
 `direction: "in"` and `inMode: "analog"`
 

lib/mjs/mjs_builtin.c

@@ -146,10 +146,17 @@ void mjs_init_builtin(struct mjs* mjs, mjs_val_t obj) {
     // mjs_set(mjs, obj, "JSON", ~0, v);
 
     /*
-    * Populate Object.create()
+    * Populate Object
     */
     v = mjs_mk_object(mjs);
     mjs_set(mjs, v, "create", ~0, mjs_mk_foreign_func(mjs, (mjs_func_ptr_t)mjs_op_create_object));
+    mjs_set(
+        mjs,
+        v,
+        "defineProperty",
+        ~0,
+        mjs_mk_foreign_func(
+            mjs, (mjs_func_ptr_t)mjs_op_object_define_property)); // stub, do not use
     mjs_set(mjs, obj, "Object", ~0, v);
 
     /*

lib/mjs/mjs_object.c

@@ -294,6 +294,11 @@ clean:
     mjs_return(mjs, ret);
 }
 
+MJS_PRIVATE void mjs_op_object_define_property(struct mjs* mjs) {
+    // stub, do not use
+    mjs_return(mjs, MJS_UNDEFINED);
+}
+
 mjs_val_t
     mjs_struct_to_obj(struct mjs* mjs, const void* base, const struct mjs_c_struct_member* defs) {
     mjs_val_t obj;

lib/mjs/mjs_object.h

@@ -50,6 +50,11 @@ MJS_PRIVATE mjs_err_t mjs_set_internal(
  */
 MJS_PRIVATE void mjs_op_create_object(struct mjs* mjs);
 
+/*
+ * Stub of `Object.defineProperty()`
+ */
+MJS_PRIVATE void mjs_op_object_define_property(struct mjs* mjs);
+
 /*
  * Cell destructor for object arena
  */

lib/mjs/mjs_parser.c

@@ -76,7 +76,8 @@ static int s_assign_ops[] = {
 
 static int findtok(int* toks, int tok) {
     int i = 0;
-    while(tok != toks[i] && toks[i] != TOK_EOF) i++;
+    while(tok != toks[i] && toks[i] != TOK_EOF)
+        i++;
     return toks[i];
 }
 
@@ -87,7 +88,7 @@ static void emit_op(struct pstate* pstate, int tok) {
 }
 
 #define BINOP_STACK_FRAME_SIZE 16
-#define STACK_LIMIT 8192
+#define STACK_LIMIT            8192
 
 // Intentionally left as macro rather than a function, to let the
 // compiler to inline calls and mimimize runtime stack usage.
@@ -166,7 +167,8 @@ static mjs_err_t parse_statement_list(struct pstate* p, int et) {
         if(drop) emit_byte(p, OP_DROP);
         res = parse_statement(p);
         drop = 1;
-        while(p->tok.tok == TOK_SEMICOLON) pnext1(p);
+        while(p->tok.tok == TOK_SEMICOLON)
+            pnext1(p);
     }
 
     /*
@@ -523,7 +525,11 @@ static mjs_err_t parse_expr(struct pstate* p) {
 static mjs_err_t parse_let(struct pstate* p) {
     mjs_err_t res = MJS_OK;
     LOG(LL_VERBOSE_DEBUG, ("[%.*s]", 10, p->tok.ptr));
-    EXPECT(p, TOK_KEYWORD_LET);
+    if((p)->tok.tok != TOK_KEYWORD_VAR && (p)->tok.tok != TOK_KEYWORD_LET &&
+       (p)->tok.tok != TOK_KEYWORD_CONST)
+        SYNTAX_ERROR(p);
+    else
+        pnext1(p);
     for(;;) {
         struct tok tmp = p->tok;
         EXPECT(p, TOK_IDENT);
@@ -910,6 +916,8 @@ static mjs_err_t parse_statement(struct pstate* p) {
         pnext1(p);
         return MJS_OK;
     case TOK_KEYWORD_LET:
+    case TOK_KEYWORD_VAR:
+    case TOK_KEYWORD_CONST:
         return parse_let(p);
     case TOK_OPEN_CURLY:
         return parse_block(p, 1);
@@ -939,7 +947,6 @@ static mjs_err_t parse_statement(struct pstate* p) {
     case TOK_KEYWORD_SWITCH:
     case TOK_KEYWORD_THROW:
     case TOK_KEYWORD_TRY:
-    case TOK_KEYWORD_VAR:
     case TOK_KEYWORD_VOID:
     case TOK_KEYWORD_WITH:
         mjs_set_errorf(

lib/mjs/mjs_tok.c

@@ -80,12 +80,13 @@ static int getnum(struct pstate* p) {
 }
 
 static int is_reserved_word_token(const char* s, int len) {
-    const char* reserved[] = {"break",     "case",   "catch", "continue",   "debugger", "default",
+    const char* reserved[] = {"break",      "case",      "catch",    "continue", "debugger",
-                              "delete",    "do",     "else",  "false",      "finally",  "for",
+                              "default",    "delete",    "do",       "else",     "false",
-                              "function",  "if",     "in",    "instanceof", "new",      "null",
+                              "finally",    "for",       "function", "if",       "in",
-                              "return",    "switch", "this",  "throw",      "true",     "try",
+                              "instanceof", "new",       "null",     "return",   "switch",
-                              "typeof",    "var",    "void",  "while",      "with",     "let",
+                              "this",       "throw",     "true",     "try",      "typeof",
-                              "undefined", NULL};
+                              "var",        "void",      "while",    "with",     "let",
+                              "const",      "undefined", NULL};
     int i;
     if(!mjs_is_alpha(s[0])) return 0;
     for(i = 0; reserved[i] != NULL; i++) {
@@ -95,7 +96,8 @@ static int is_reserved_word_token(const char* s, int len) {
 }
 
 static int getident(struct pstate* p) {
-    while(mjs_is_ident(p->pos[0]) || mjs_is_digit(p->pos[0])) p->pos++;
+    while(mjs_is_ident(p->pos[0]) || mjs_is_digit(p->pos[0]))
+        p->pos++;
     p->tok.len = p->pos - p->tok.ptr;
     p->pos--;
     return TOK_IDENT;
@@ -125,7 +127,8 @@ static void skip_spaces_and_comments(struct pstate* p) {
             p->pos++;
         }
         if(p->pos[0] == '/' && p->pos[1] == '/') {
-            while(p->pos[0] != '\0' && p->pos[0] != '\n') p->pos++;
+            while(p->pos[0] != '\0' && p->pos[0] != '\n')
+                p->pos++;
         }
         if(p->pos[0] == '/' && p->pos[1] == '*') {
             p->pos += 2;
@@ -142,8 +145,8 @@ static void skip_spaces_and_comments(struct pstate* p) {
 }
 
 static int ptranslate(int tok) {
-#define DT(a, b) ((a) << 8 | (b))
+#define DT(a, b)       ((a) << 8 | (b))
-#define TT(a, b, c) ((a) << 16 | (b) << 8 | (c))
+#define TT(a, b, c)    ((a) << 16 | (b) << 8 | (c))
 #define QT(a, b, c, d) ((a) << 24 | (b) << 16 | (c) << 8 | (d))
     /* Map token ID produced by mjs_tok.c to token ID produced by lemon */
     /* clang-format off */

lib/mjs/mjs_tok.h

@@ -125,6 +125,7 @@ enum {
     TOK_KEYWORD_WHILE,
     TOK_KEYWORD_WITH,
     TOK_KEYWORD_LET,
+    TOK_KEYWORD_CONST,
     TOK_KEYWORD_UNDEFINED,
     TOK_MAX
 };

tsconfig.json

@@ -3,13 +3,13 @@
         "checkJs": true,
         "module": "CommonJS",
         "typeRoots": [
-            "./applications/system/js_app/types"
+            "./applications/system/js_app/packages/fz-sdk/"
         ],
         "noLib": true,
     },
     "include": [
         "./applications/system/js_app/examples/apps/Scripts",
         "./applications/debug/unit_tests/resources/unit_tests/js",
-        "./applications/system/js_app/types/global.d.ts",
+        "./applications/system/js_app/packages/fz-sdk/global.d.ts",
     ]
 }