# `wasm-bindgen` Change Log -------------------------------------------------------------------------------- ## Unreleased Released YYYY-MM-DD. ### Added * TODO (or remove section if none) ### Changed * TODO (or remove section if none) ### Deprecated * TODO (or remove section if none) ### Removed * TODO (or remove section if none) ### Fixed * TODO (or remove section if none) ### Security * TODO (or remove section if none) -------------------------------------------------------------------------------- ## 0.2.33 Released 2019-01-18. ### Added * Improved the `Debug` output of `JsValue` [#1161](https://github.com/rustwasm/wasm-bindgen/pull/1161) * Bindings for `JSON.stringify` and its optional arguments have been added [#1190](https://github.com/rustwasm/wasm-bindgen/pull/1190) ### Fixed * A bug with windows binaries being released has ben resolved. -------------------------------------------------------------------------------- ## 0.2.32 Released 2019-01-16. ### Added * Added support for Web IDL sequences. This enabled bindings generation for a couple more Web APIs. We generate functions for Web APIs that take sequences to accept any iterable, and for Web APIs that return sequences, a `js_sys::Array` is returned. See [#1152](https://github.com/rustwasm/wasm-bindgen/pull/1152) and [#1038](https://github.com/rustwasm/wasm-bindgen/issues/1038). * The `wasm-bindgen-test` test runner will capture `console.debug`, `console.info`, and `console.warn` log messages and print them to `stdout` now. It already supported `console.log` and `console.error` and continues to support them. See [#1183](https://github.com/rustwasm/wasm-bindgen/issues/1183) and [#1184](https://github.com/rustwasm/wasm-bindgen/pull/1184). * Added additional `--debug`-only assertions in the emitted JS glue for cases where an imported JS function that is not annotated with `#[wasm_bindgen(catch)]` throws an exception. This should help catch some bugs earlier! See [#1179](https://github.com/rustwasm/wasm-bindgen/pull/1179). ### Fixed * Fixed a bug where `#[wasm_bindgen_test]` tests would fail in non-headless Web browsers if they used `console.log`. See [#1167](https://github.com/rustwasm/wasm-bindgen/pull/1167). * Fixed a bug where returning closures from exported functions sometimes resulted in a faulty error. See [#1174](https://github.com/rustwasm/wasm-bindgen/issues/1174) and [#1175](https://github.com/rustwasm/wasm-bindgen/pull/1175). * Sometimes our generated TypeScript interface files had syntax errors in them (missing semicolons). This has been fixed. See [#1181](https://github.com/rustwasm/wasm-bindgen/pull/1181). -------------------------------------------------------------------------------- ## 0.2.31 Released 2019-01-09. ### Added * A new `spawn_local` function has been added to the `wasm-bindgen-futures` crate. [#1148](https://github.com/rustwasm/wasm-bindgen/pull/1148) * Built-in conversions are now available from typed arrays and Rust arrays. [#1147](https://github.com/rustwasm/wasm-bindgen/pull/1147) ### Fixed * Some casing of dictionary properties in WebIDL has been fixed. [#1155](https://github.com/rustwasm/wasm-bindgen/pull/1155) -------------------------------------------------------------------------------- ## 0.2.30 Released 2019-01-07. ### Added * The `wasm-bindgen` CLI now has an `--out-name` argument to name the output module. [#1084](https://github.com/rustwasm/wasm-bindgen/pull/1084) * Support for importing the `default` export has been added. [#1106](https://github.com/rustwasm/wasm-bindgen/pull/1106) ### Changed * All `web-sys` methods are now flagged as `structural`, fixing a few bindings. [#1117](https://github.com/rustwasm/wasm-bindgen/pull/1117) ### Fixed * A small bug with LTO and closures has been fixed. [#1145](https://github.com/rustwasm/wasm-bindgen/pull/1145) -------------------------------------------------------------------------------- ## 0.2.29 Released 2018-12-04. ### Added * Add a `#[wasm_bindgen(start)]` attribute to customize the `start` section of the wasm module. [#1057](https://github.com/rustwasm/wasm-bindgen/pull/1057) * Add support for producing the new "producers" section of wasm binaries [#1041](https://github.com/rustwasm/wasm-bindgen/pull/1041) * Add support a `typescript_custom_section` attribute for producing custom typescript abstractions [#1048](https://github.com/rustwasm/wasm-bindgen/pull/1048) * Generate `*.d.ts` files for wasm files in addition to the JS bindings [#1053](https://github.com/rustwasm/wasm-bindgen/pull/1053) * Add a feature to assert that all attributes in `#[wasm_bindgen]` are used to help catch typos and mistakes [#1055](https://github.com/rustwasm/wasm-bindgen/pull/1055) ### Changed * JS glue generation has received a few small optimizations such as removing shims and removing object allocations [#1033](https://github.com/rustwasm/wasm-bindgen/pull/1033) [#1030](https://github.com/rustwasm/wasm-bindgen/pull/1030) * JS glue now just uses one array of JS objects instead of two [#1069](https://github.com/rustwasm/wasm-bindgen/pull/1069) ### Fixed * Fix a typo in the `--no-modules` generated JS [#1045](https://github.com/rustwasm/wasm-bindgen/pull/1045) -------------------------------------------------------------------------------- ## 0.2.28 Released 2018-11-12. ### Added * The `js_class` support is now supported on exported types to define a different class in JS than is named in Rust [#1012](https://github.com/rustwasm/wasm-bindgen/pull/1012) * More WebIDL bindings are exposed with some internal restructuring to ignore unimplemented types at a different location [#1014](https://github.com/rustwasm/wasm-bindgen/pull/1014) * All imported types now implement `Deref` to their first `extends` attribute (or `JsValue` if one isn't listed). This is intended to greatly improve the ergonomics of `web-sys` bindings by allowing easy access to parent class methods [#1019](https://github.com/rustwasm/wasm-bindgen/pull/1019) * A new attribute, `final`, can be applied to JS imports. This attribute is relatively nuanced and [best explained in documentation][final-dox], but is added since `structural` is now the default [#1019](https://github.com/rustwasm/wasm-bindgen/pull/1019) [final-dox]: https://rustwasm.github.io/wasm-bindgen/reference/attributes/on-js-imports/final.html * A new CLI flag, `--remove-name-section`, can be passed to remove the wasm `name` section which contains the names of functions for debugging (typically not needed in release mode) [#1024](https://github.com/rustwasm/wasm-bindgen/pull/1024) ### Changed * All imported functions are now `structural` by default. This shouldn't change the semantics of imported functions, only how they're invoked in the JS function shims that are generated by `wasm-bindgen`. More discussion can be founed on [RFC 5] and the PR [#1019](https://github.com/rustwasm/wasm-bindgen/pull/1019) [RFC 5]: https://rustwasm.github.io/rfcs/005-structural-and-deref.html * JS glue assertions for moved arguments are now only emitted in debug mode, which is still off by default [#1020](https://github.com/rustwasm/wasm-bindgen/pull/1020) ### Fixed * Typescript generated bindings now correctly reflect `Option` for more types [#1008](https://github.com/rustwasm/wasm-bindgen/pull/1008) * The JS shim code generation has been optimized for `structural` bindings (now the default) to include fewer JS shims and more easily optimizable for JS engines [#1019](https://github.com/rustwasm/wasm-bindgen/pull/1019) * Passing a `WebAssembly.Module` to the `--no-modules` constructor has been fixed [#1025](https://github.com/rustwasm/wasm-bindgen/pull/1025) -------------------------------------------------------------------------------- ## 0.2.27 Released 2018-10-29. ### Fixed * Fixed an internal panic where the gc passes were being too aggressive [#995](https://github.com/rustwasm/wasm-bindgen/pull/995) -------------------------------------------------------------------------------- ## 0.2.26 Released 2018-10-29. ### Added * The `TypedArray.slice` methods have now been bound in `js-sys`. [#956](https://github.com/rustwasm/wasm-bindgen/pull/956) * The `Debug` and `Clone` traits are now implemented for `js_sys::Promise`. [#957](https://github.com/rustwasm/wasm-bindgen/pull/957) * The `js_sys::DataView` type now exposes overloads to specify endianness. [#966](https://github.com/rustwasm/wasm-bindgen/pull/966) * When using `--no-modules` a `WebAssembly.Module` can now be directly passed into the instantiation glue. [#969](https://github.com/rustwasm/wasm-bindgen/pull/969) ### Fixed * The `JsValue` type is no longer considered `Send`. [#955](https://github.com/rustwasm/wasm-bindgen/pull/955) * The generated JS glue is now more robust in the face of missing APIs. [#959](https://github.com/rustwasm/wasm-bindgen/pull/959) * An issue with the latest version of `safaridriver` used to run headless tests has been resolved. [#991](https://github.com/rustwasm/wasm-bindgen/pull/991) -------------------------------------------------------------------------------- ## 0.2.25 Released 2018-10-10. ### Fixed * Using `wasm-bindgen` will no longer unconditionally pull in Rust's default allocator for Wasm (dlmalloc) regardless if you configured a custom global allocator (eg wee_alloc). [#947](https://github.com/rustwasm/wasm-bindgen/pull/947) * Fixed web-sys build on some Windows machines. [#943](https://github.com/rustwasm/wasm-bindgen/issues/943) * Fixed generated ES class bindings to Rust structs that were only referenced through struct fields. [#948](https://github.com/rustwasm/wasm-bindgen/issues/948) -------------------------------------------------------------------------------- ## 0.2.24 Released 2018-10-05. ### Added * Constructors for types in `web-sys` should now have better documentation. * A new `vendor_prefix` attribute in `#[wasm_bindgen]` is supported to bind APIs on the web which may have a vendor prefix (like `webkitAudioContext`). This is then subsequently used to fix `AudioContext` usage in Safari. * The `#[wasm_bindgen(extends = Foo)]` attribute now supports full paths, so you can also say `#[wasm_bindgen(extends = foo::Bar)]` and such. ### Changed * The `Closure` type is now optimized when the underlying closure is a ZST. The type now no longer allocates memory in this situation. * The documentation now has a list of caveats for browser support, including how `TextEncoder` and `TextDecoder` are not implemented in Edge. If you're using webpack there's a listed strategy available, and improvements to the polyfill strategy are always welcome! * The `BaseAudioContext` and `AudioScheduledSourceNode` types in `web-sys` have been deprecated as they don't exist in Safari or Edge. ### Fixed * Fixed the `#[wasm_bindgen_test]`'s error messages in a browser to correctly escape HTML-looking output. * WebIDL Attributes on `Window` are now correctly bound to not go through `Window.prototype` which doesn't exist but instead use a `structural` definition. * Fixed a codegen error when the `BorrowMut` trait was in scope. * Fixed TypeScript generation for constructors of classes, it was accidentally producing a syntactially invalid file! -------------------------------------------------------------------------------- ## 0.2.23 Released 2018-09-26. ### Added * [This is the first release of the `web-sys` crate!](https://rustwasm.github.io/2018/09/26/announcing-web-sys.html) * Added support for unions of interfaces and non-interfaces in the WebIDL frontend. * Added a policy for inclusion of new ECMAScript features in `js-sys`: the feature must be in stage 4 or greater for us to support it. * Added some documentation about size profiling and optimization with `wasm-bindgen` to the guide. * Added the `Clamped` type for generating JavaScript `Uint8ClampedArray`s. * CI is now running on beta! Can't wait for the `rustc` release trains to roll over, so we can run CI on stable too! * Added the `js_sys::try_iter` function, which checks arbitrary JS values for compliance with the JS iteration protocol, and if they are iterable, converts them into an iterator over the JS values that they yield. ### Changed * We now only generate null checks on methods on the JS side when in debug mode. For safety we will always null check on the Rust side, however. * Improved error messages when defining setters that don't start with `set_` and don't use `js_name = ...`. * Improved generated code for classes in a way that avoids an unnecessary allocation with static methods that return `Self` but are not the "main" constructor. * **BREAKING:** `js_sys::Reflect` APIs are all fallible now. This is because reflecting on `Proxy`s whose trap handlers throw an exception can cause any of the reflection APIs to throw. Accordingly, `js_sys` has been bumped from `0.2.X` to `0.3.X`. ### Fixed * The method of ensuring that `__wbindgen_malloc` and `__wbindgen_free` are always emitted in the `.wasm` binary, regardless of seeming reachability is now zero-overhead. -------------------------------------------------------------------------------- ## 0.2.22 Released 2018-09-21 ### Added * The `IntoIterator` trait is now implemented for JS `Iterator` types * A number of variadic methods in `js-sys` have had explicit arities added. * The guide has been improved quite a bit as well as enhanced with more examples * The `js-sys` crate is now complete! Thanks so much to everyone involved to help fill out all the APIs. * Exported Rust functions with `#[wasm_bindgen]` can now return a `Result` where the `Err` payload is raised as an exception in JS. ### Fixed * An issue with running `wasm-bindgen` on crates that have been compiled with LTO has been resolved. -------------------------------------------------------------------------------- ## 0.2.21 Released 2018-09-07 ### Added * Added many more bindings for `WebAssembly` in the `js-sys` crate. ### Fixed * The "names" section of the wasm binary is now correctly preserved by wasm-bindgen. -------------------------------------------------------------------------------- ## 0.2.20 Released 2018-09-06 ### Added * All of `wasm-bindgen` is configured to compile on stable Rust as of the upcoming 1.30.0 release, scheduled for October 25, 2018. * The underlying `JsValue` of a `Closure` type can now be extracted at any time. * Initial and experimental support was added for modules that have shared memory (use atomic instructions). ### Removed * The `--wasm2asm` flag of `wasm2es6js` was removed because the `wasm2asm` tool has been removed from upstream Binaryen. This is replaced with the new `wasm2js` tool from Binaryen. ### Fixed * The "schema" version for wasm-bindgen now changes on all publishes, meaning we can't forget to update it. This means that the crate version and CLI version must exactly match. * The `wasm-bindgen` crate now has a `links` key which forbids multiple versions of `wasm-bindgen` from being linked into a dependency graph, fixing obscure linking errors with a more first-class error message. * Binary releases for Windows has been fixed. -------------------------------------------------------------------------------- ## 0.2.19 (and 0.2.18) Released 2018-08-27. ### Added * Added bindings to `js-sys` for some `WebAssembly` types. * Added bindings to `js-sys` for some `Intl` types. * Added bindings to `js-sys` for some `String` methods. * Added an example of using the WebAudio APIs. * Added an example of using the `fetch` API. * Added more `extends` annotations for types in `js-sys`. * Experimental support for `WeakRef` was added to automatically deallocate Rust objects when gc'd. * Added support for executing `wasm-bindgen` over modules that import their memory. * Added a global `memory()` function in the `wasm-bindgen` crate for accessing the JS object that represent wasm's own memory. ### Removed * Removed `AsMut` implementations for imported objects. ### Fixed * Fixed the `constructor` and `catch` attributes combined on imported types. * Fixed importing the same-named static in two modules. -------------------------------------------------------------------------------- ## 0.2.17 Released 2018-08-16. ### Added * Greatly expanded documentation in the wasm-bindgen guide. * Added bindings to `js-sys` for `Intl.DateTimeFormat` * Added a number of `extends` attributes for types in `js-sys` ### Fixed * Fixed compile on latest nightly with latest `proc-macro2` * Fixed compilation in some scenarios on Windows with paths in `module` paths -------------------------------------------------------------------------------- ## 0.2.16 Released 2018-08-13. ### Added * Added the `wasm_bindgen::JsCast` trait, as described in [RFC #2][rfc-2]. * Added [the `#[wasm_bindgen(extends = ...)]` attribute][extends-attr] to describe inheritance relationships, as described in [RFC #2][rfc-2]. * Added support for receiving `Option<&T>` parameters from JavaScript in exported Rust functions and methods. * Added support for receiving `Option` and other option-wrapped scalars. * Added reference documentation to the guide for every `#[wasm_bindgen]` attribute and how it affects the generated bindings. * Published the `wasm-bindgen-futures` crate for converting between JS `Promise`s and Rust `Future`s. ### Changed * Overhauled the guide's documentation on passing JS closures to Rust, and Rust closures to JS. * Overhauled the guide's documentation on using serde to serialize complex data to `JsValue` and deserialize `JsValue`s back into complex data. * Static methods are now always bound to their JS class, as is required for `Promise`'s static methods. ### Removed * Removed internal usage of `syn`'s `visit-mut` cargo feature, which should result in faster build times. ### Fixed * Various usage errors for the `#[wasm_bindgen]` proc-macro are now properly reported with source span information, rather than `panic!()`s inside the proc-macro. * Fixed a bug where taking a struct by reference and returning a slice resulted in lexical variable redeclaration errors in the generated JS glue. [#662][] * The `#[wasm_bindgen(js_class = "....")]` attribute for binding methods to renamed imported JS classes now properly works with constructors. [rfc-2]: https://rustwasm.github.io/rfcs/002-wasm-bindgen-inheritance-casting.html [extends-attr]: https://rustwasm.github.io/wasm-bindgen/reference/attributes/on-js-imports/extends.html [#662]: https://github.com/rustwasm/wasm-bindgen/pull/662 -------------------------------------------------------------------------------- ## 0.2.15 Released 2018-07-26. ### Fixed * Fixed `wasm-bindgen` CLI version mismatch checks that got broken in the last point release. -------------------------------------------------------------------------------- ## 0.2.14 Released 2018-07-25. ### Fixed * Fixed compilation errors on targets that use Mach-O. [#545](https://github.com/rustwasm/wasm-bindgen/issues/545) -------------------------------------------------------------------------------- ## 0.2.13 Released 2018-07-22. ### Added * Support the `#[wasm_bindgen(js_name = foo)]` attribute on exported functions and methods to allow renaming an export to JS. This allows JS to call it by one name and Rust to call it by another, for example using `camelCase` in JS and `snake_case` in Rust ### Fixed * Compilation with the latest nightly compiler has been fixed (nightlies on and after 2018-07-21) -------------------------------------------------------------------------------- ## 0.2.12 Released 2018-07-19. This release is mostly internal refactorings and minor improvements to the existing crates and functionality, but the bigs news is an upcoming `js-sys` and `web-sys` set of crates. The `js-sys` crate will expose [all global JS bindings][js-all] and the `web-sys` crate will be generated from WebIDL to expose all APIs browsers have. More info on this soon! [js-all]: https://github.com/rustwasm/wasm-bindgen/issues/275 ### Added * Support for `Option` was added where `T` can be a number of slices or imported types. * Comments in Rust are now preserved in generated JS bindings, as well as comments being generated to indicate the types of arguments/return values. * The online documentation has been reorganized [into a book][book]. * The generated JS is now formatted better by default for readability. * A `--keep-debug` flag has been added to the CLI to retain debug sections by default. This happens by default when `--debug` is passed. [book]: https://rustwasm.github.io/wasm-bindgen/ ### Fixed * Compilation with the latest nightly compiler has been fixed (nightlies on and after 2018-07-19) * Declarations of an imported function in multiple crates have been fixed to not conflict. * Compilation with `#![deny(missing_docs)]` has been fixed. -------------------------------------------------------------------------------- ## 0.2.11 Released 2018-05-24. -------------------------------------------------------------------------------- ## 0.2.10 Released 2018-05-17. -------------------------------------------------------------------------------- ## 0.2.9 Released 2018-05-11.