docs: document what experimental means explicitly (#22893)

* docs: document what experimental means explicitly

* Apply suggestions from code review

Co-Authored-By: Jeremy Apthorp <jeremya@chromium.org>

* Update experimental.md

Co-authored-by: Jeremy Apthorp <jeremya@chromium.org>

docs/api/app.md

@@ -1225,7 +1225,7 @@ stopAccessingSecurityScopedResource()
 
 Start accessing a security scoped resource. With this method Electron applications that are packaged for the Mac App Store may reach outside their sandbox to access files chosen by the user. See [Apple's documentation](https://developer.apple.com/library/content/documentation/Security/Conceptual/AppSandboxDesignGuide/AppSandboxInDepth/AppSandboxInDepth.html#//apple_ref/doc/uid/TP40011183-CH3-SW16) for a description of how this system works.
 
-### `app.enableSandbox()` _Experimental_
+### `app.enableSandbox()`
 
 Enables full sandbox mode on the app. This means that all renderers will be launched sandboxed, regardless of the value of the `sandbox` flag in WebPreferences.
 

docs/api/browser-window.md

@@ -1768,7 +1768,7 @@ Set a custom position for the traffic light buttons. Can only be used with `titl
 Returns `Point` - The current position for the traffic light buttons. Can only be used with `titleBarStyle`
 set to `hidden`.
 
-#### `win.setTouchBar(touchBar)` _macOS_ _Experimental_
+#### `win.setTouchBar(touchBar)` _macOS_
 
 * `touchBar` TouchBar | null
 

docs/api/notification.md

@@ -26,7 +26,7 @@ The `Notification` class has the following static methods:
 
 Returns `Boolean` - Whether or not desktop notifications are supported on the current system
 
-### `new Notification([options])` _Experimental_
+### `new Notification([options])`
 
 * `options` Object (optional)
   * `title` String - A title for the notification, which will be shown at the top of the notification window when it is shown.

docs/api/sandbox-option.md

@@ -54,7 +54,7 @@ only via IPC. The use of this option stops Electron from creating a Node.js runt
 within this new window `window.open` follows the native behavior (by default Electron creates a [`BrowserWindow`](browser-window.md)
 and returns a proxy to this via `window.open`).
 
-[`app.enableSandbox`](app.md#appenablesandbox-experimental) can be used to force `sandbox: true` for all `BrowserWindow` instances.
+[`app.enableSandbox`](app.md#appenablesandbox) can be used to force `sandbox: true` for all `BrowserWindow` instances.
 
 ```js
 let win

docs/api/touch-bar-button.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarButton(options)` _Experimental_
+### `new TouchBarButton(options)`
 
 * `options` Object
   * `label` String (optional) - Button text.

docs/api/touch-bar-color-picker.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarColorPicker(options)` _Experimental_
+### `new TouchBarColorPicker(options)`
 
 * `options` Object
   * `availableColors` String[] (optional) - Array of hex color strings to

docs/api/touch-bar-group.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarGroup(options)` _Experimental_
+### `new TouchBarGroup(options)`
 
 * `options` Object
   * `items` [TouchBar](touch-bar.md) - Items to display as a group.

docs/api/touch-bar-label.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarLabel(options)` _Experimental_
+### `new TouchBarLabel(options)`
 
 * `options` Object
   * `label` String (optional) - Text to display.

docs/api/touch-bar-other-items-proxy.md

@@ -9,4 +9,4 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarOtherItemsProxy()` _Experimental_
+### `new TouchBarOtherItemsProxy()`

docs/api/touch-bar-popover.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarPopover(options)` _Experimental_
+### `new TouchBarPopover(options)`
 
 * `options` Object
   * `label` String (optional) - Popover button text.

docs/api/touch-bar-scrubber.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarScrubber(options)` _Experimental_
+### `new TouchBarScrubber(options)`
 
 * `options` Object
   * `items` [ScrubberItem[]](structures/scrubber-item.md) - An array of items to place in this scrubber.

docs/api/touch-bar-segmented-control.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarSegmentedControl(options)` _Experimental_
+### `new TouchBarSegmentedControl(options)`
 
 * `options` Object
   * `segmentStyle` String (optional) - Style of the segments:

docs/api/touch-bar-slider.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarSlider(options)` _Experimental_
+### `new TouchBarSlider(options)`
 
 * `options` Object
   * `label` String (optional) - Label text.

docs/api/touch-bar-spacer.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBarSpacer(options)` _Experimental_
+### `new TouchBarSpacer(options)`
 
 * `options` Object
   * `size` String (optional) - Size of spacer, possible values are:

docs/api/touch-bar.md

@@ -4,7 +4,7 @@
 
 Process: [Main](../tutorial/application-architecture.md#main-and-renderer-processes)
 
-### `new TouchBar(options)` _Experimental_
+### `new TouchBar(options)`
 
 * `options` Object
   * `items` ([TouchBarButton](touch-bar-button.md) | [TouchBarColorPicker](touch-bar-color-picker.md) | [TouchBarGroup](touch-bar-group.md) | [TouchBarLabel](touch-bar-label.md) | [TouchBarPopover](touch-bar-popover.md) | [TouchBarScrubber](touch-bar-scrubber.md) | [TouchBarSegmentedControl](touch-bar-segmented-control.md) | [TouchBarSlider](touch-bar-slider.md) | [TouchBarSpacer](touch-bar-spacer.md))[] (optional)

docs/api/web-contents.md

@@ -389,7 +389,7 @@ Calling `event.preventDefault` will prevent the page `keydown`/`keyup` events
 and the menu shortcuts.
 
 To only prevent the menu shortcuts, use
-[`setIgnoreMenuShortcuts`](#contentssetignoremenushortcutsignore-experimental):
+[`setIgnoreMenuShortcuts`](#contentssetignoremenushortcutsignore):
 
 ```javascript
 const { BrowserWindow } = require('electron')
@@ -1051,7 +1051,7 @@ or is rejected if the result of the code is a rejected promise.
 
 Works like `executeJavaScript` but evaluates `scripts` in an isolated context.
 
-#### `contents.setIgnoreMenuShortcuts(ignore)` _Experimental_
+#### `contents.setIgnoreMenuShortcuts(ignore)`
 
 * `ignore` Boolean
 

docs/experimental.md

@@ -0,0 +1,23 @@
+# Experimental APIs
+
+Some of Electrons APIs are tagged with `_Experimental_` in the documentation.
+This tag indicates that the API may not be considered stable and the API may
+be removed or modified more frequently than other APIs with less warning.
+
+## Conditions for an API to be tagged as Experimental
+
+Anyone can request an API be tagged as experimental in a feature PR, disagreements
+on the experimental nature of a feature can be discussed in the API WG if they
+can't be resolved in the PR.
+
+## Process for removing the Experimental tag
+
+Once an API has been stable and in at least two major stable release lines it
+can be nominated to have its experimental tag removed.  This discussion should
+happen at an API WG meeting.  Things to consider when discussing / nominating:
+
+* The above "two major stables release lines" condition must have been met
+* During that time no major bugs / issues should have been caused by the adoption of this feature
+* The API is stable enough and hasn't been heavily impacted by Chromium upgrades
+* Is anyone using the API?
+* Is the API fulfilling the original proposed usecases, does it have any gaps?