docs: start adding an API cheat sheet (#7045)

docs/src/cheat-sheet.md

@@ -0,0 +1,302 @@
+---
+id: cheat-sheet
+title: "Cheat Sheet"
+---
+
+<!-- TOC3 -->
+
+## Download & Upload
+
+### Download file
+
+```js
+const [ download ] = await Promise.all([
+  page.waitForEvent('download'),
+  page.click('button')
+]);
+const path = await download.path();
+```
+
+```python async
+async with page.expect_download() as download_info:
+    await page.click("button")
+download = await download_info.value
+path = await download.path()
+```
+
+```python sync
+with page.expect_download() as download_info:
+    page.click("button")
+download = download_info.value
+path = download.path()
+```
+
+```csharp
+var waitForDownloadTask = page.WaitForDownloadAsync();
+await page.ClickAsync("#downloadButton");
+var download = await waitForDownloadTask;
+var path = await download.PathAsync();
+```
+
+[Learn more](./downloads.md)
+
+### Upload file
+
+```js
+await page.setInputFiles('input#upload', 'myfile.pdf');
+```
+
+```java
+page.setInputFiles("input#upload", Paths.get("myfile.pdf"));
+```
+
+```python async
+await page.set_input_files('input#upload', 'myfile.pdf')
+```
+
+```python sync
+page.set_input_files('input#upload', 'myfile.pdf')
+```
+
+```csharp
+await page.SetInputFilesAsync("input#upload", "myfile.pdf");
+```
+
+[Learn more](./input#upload-files)
+
+### Upload multiple files
+
+```js
+await page.setInputFiles('input#upload', ['file1.txt', 'file2.txt']);
+```
+
+```java
+page.setInputFiles("input#upload", new Path[] {Paths.get("file1.txt"), Paths.get("file2.txt")});
+```
+
+```python async
+await page.set_input_files('input#upload', ['file1.txt', 'file2.txt'])
+```
+
+```python sync
+page.set_input_files('input#upload', ['file1.txt', 'file2.txt'])
+```
+
+```csharp
+await page.SetInputFilesAsync("input#upload", new[] { "file1.txt", "file12.txt" });
+```
+
+[Learn more](./input#upload-files)
+
+### Upload from memory
+
+```js
+await page.setInputFiles('input#upload', {
+  name: 'file.txt',
+  mimeType: 'text/plain',
+  buffer: Buffer.from('this is test')
+});
+```
+
+```java
+page.setInputFiles("input#upload", new FilePayload(
+  "file.txt", "text/plain", "this is test".getBytes(StandardCharsets.UTF_8)));
+```
+
+```python async
+await page.set_input_files(
+    "input#upload",
+    files=[
+        {"name": "test.txt", "mimeType": "text/plain", "buffer": b"this is a test"}
+    ],
+)
+```
+
+```python sync
+page.set_input_files(
+    "input#upload",
+    files=[
+        {"name": "test.txt", "mimeType": "text/plain", "buffer": b"this is a test"}
+    ],
+)
+```
+
+```csharp
+await page.SetInputFilesAsync("input#upload", new FilePayload
+{
+    Name = "file.txt",
+    MimeType = "text/plain",
+    Buffer = "this is a test".getBytes(StandardCharsets.UTF_8),
+});
+```
+
+[Learn more](./input#upload-files)
+
+### Remove selected files
+
+```js
+await page.setInputFiles('input#upload', []);
+```
+
+```java
+page.setInputFiles("input#upload", new Path[0]);
+```
+
+```python async
+await page.set_input_files('input#upload', [])
+```
+
+```python sync
+page.set_input_files('input#upload', [])
+```
+
+```csharp
+await page.SetInputFilesAsync("input#upload", new[] {});
+```
+
+[Learn more](./input#upload-files)
+
+### Handle file picker
+
+```js
+const [fileChooser] = await Promise.all([
+  page.waitForEvent('filechooser'),
+  page.click('upload')
+]);
+await fileChooser.setFiles('myfile.pdf');
+```
+
+```java
+FileChooser fileChooser = page.waitForFileChooser(() -> {
+  page.click("upload");
+});
+fileChooser.setFiles(Paths.get("myfile.pdf"));
+```
+
+```python async
+async with page.expect_file_chooser() as fc_info:
+    await page.click("upload")
+file_chooser = await fc_info.value
+await file_chooser.set_files("myfile.pdf")
+```
+
+```python sync
+with page.expect_file_chooser() as fc_info:
+    page.click("upload")
+file_chooser = fc_info.value
+file_chooser.set_files("myfile.pdf")
+```
+
+```csharp
+var fileChooser = page.RunAndWaitForFileChooserAsync(async () =>
+{
+    await page.ClickAsync("upload");
+});
+await fileChooser.SetFilesAsync("myfile.pdf");
+```
+
+[Learn more](./input#upload-files)
+
+
+## Manage &#60iframe&#62s
+
+### List frames
+
+```js
+const frames = page.frames();
+```
+
+```java
+List<Frame> frames = page.frames();
+```
+
+```python async
+frames = page.frames
+```
+
+```python sync
+frames = page.frames
+```
+
+```csharp
+var frame = page.Frames;
+```
+
+[Learn more](./core-concepts#pages-and-frames)
+
+### Frame by `name` attribute
+
+```js
+const frame = page.frame('frame-login');
+```
+
+```java
+Frame frame = page.frame("frame-login");
+```
+
+```python async
+frame = page.frame('frame-login')
+```
+
+```python sync
+frame = page.frame('frame-login')
+```
+
+```csharp
+var frame = page.Frame("frame-login");
+```
+
+[Learn more](./core-concepts#pages-and-frames)
+
+### Frame by URL
+
+```js
+const frame = page.frame({ url: /.*domain.*/ });
+```
+
+```java
+Frame frame = page.frameByUrl(Pattern.compile(".*domain.*"));
+```
+
+```python async
+frame = page.frame(url=r'.*domain.*')
+```
+
+```python sync
+frame = page.frame(url=r'.*domain.*')
+```
+
+```csharp
+var frame = page.FrameByUrl("*domain.");
+```
+
+[Learn more](./core-concepts#pages-and-frames)
+
+### Frame by selector
+
+```js
+const frameElementHandle = await page.$('.frame-class');
+const frame = await frameElementHandle.contentFrame();
+```
+
+```java
+ElementHandle frameElementHandle = page.querySelector(".frame-class");
+Frame frame = frameElementHandle.contentFrame();
+```
+
+```python async
+frame_element_handle = await page.query_selector('.frame-class')
+frame = await frame_element_handle.content_frame()
+```
+
+```python sync
+frame_element_handle = page.query_selector('.frame-class')
+frame = frame_element_handle.content_frame()
+```
+
+```csharp
+var frameElementHandle = await page.QuerySelectorAsync(".frame-class");
+var frame = await frameElementHandle.ContentFrameAsync();
+```
+
+[Learn more](./core-concepts#pages-and-frames)

docs/src/chrome-extensions.md

@@ -1,6 +1,6 @@
 ---
-id: extensions
-title: "Testing extensions"
+id: chrome-extensions
+title: "Chrome Extensions"
 ---
 
 :::note

docs/src/downloads.md

@@ -57,7 +57,7 @@ var waitForDownloadTask = page.WaitForDownloadAsync();
 await page.ClickAsync("#downloadButton");
 // Wait for the download process to complete
 var download = await waitForDownloadTask;
-Console.WriteLine(await download.PathAsync());
+var path = await download.PathAsync();
 ```
 
 #### Variations