### Accessing Application Started Promise (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/classes/application.html

Provides a public accessor that returns a `Promise<void>`. This promise resolves after the `start()` method is called and all bootstrapping and shell mounting work is complete, allowing external code to await the application's readiness.

```TypeScript
get started(): Promise<void>
```

--------------------------------

### Installing Message Hook (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/messaging/modules/messageloop.html

Installs a message hook for a given message handler. The hook is invoked before a message is delivered to the handler. If the hook returns `false`, message delivery is halted. Hooks are executed in reverse order of installation, and installing an already present hook is a no-op.

```TypeScript
installMessageHook(handler: IMessageHandler, hook: MessageHook): void
```

--------------------------------

### Initializing Application Started Flag (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/classes/application.html

Initializes a private boolean flag to `false`. This flag indicates whether the application's startup process has completed, providing an internal state tracker for its lifecycle.

```TypeScript
_started: boolean = false
```

--------------------------------

### Publishing Phosphor Package - Bash

Source: https://github.com/phosphorjs/phosphor/blob/master/RELEASE.md

This snippet provides the sequence of Bash commands required to clean the project directory, install dependencies, update the package version, and publish the Phosphor package to a registry. It ensures a clean build and proper versioning before publication.

```bash
git clean -dfx
yarn
yarn run version
yarn run publish
```

--------------------------------

### Getting Parent Widget of Layout in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/panellayout.html

This getter property retrieves the parent widget to which the layout is currently attached. It is automatically set when the layout is installed on a parent widget and should not be directly manipulated by user code.

```TypeScript
get parent(): Widget | null
```

--------------------------------

### Getting Layout Parent Widget in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/layout.html

Retrieves the parent widget to which the layout is attached. This property is automatically set when the layout is installed on a parent widget and should not be directly manipulated by user code. Returns the parent `Widget` or `null`.

```TypeScript
get parent(): Widget | null
```

--------------------------------

### Loading Search Script for Local Documentation - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/gridlayout.layout.ioptions.html

This JavaScript snippet is executed when the documentation is accessed directly from the file system (using the 'file:' protocol). Its purpose is to dynamically inject the 'search.js' script, enabling search functionality for the local documentation.

```JavaScript
if (location.protocol == 'file:') document.write('<script src=\"../assets/js/search.js\"><' + '/script>');
```

--------------------------------

### Removing Last Occurrence of Value in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This example illustrates the usage of `ArrayExt.removeLastOf` to remove the last occurrence of a specific value from an array. It demonstrates how to specify the value to remove and how to use optional start and stop indices to narrow the search range, returning the index of the removed value.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

let data = [0, 12, 23, 39, 14, 12, 75];
ArrayExt.removeLastOf(data, 12);        // 5
ArrayExt.removeLastOf(data, 17);        // -1
ArrayExt.removeLastOf(data, 39, 2);     // -1
ArrayExt.removeLastOf(data, 39, 2, 3);  // 3
```

--------------------------------

### Constructing a DataStore Instance (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/datastore/classes/datastore.html

Initializes a new `DataStore` instance. It requires a root reducer function to handle state transitions and an initial state object. The `DataStore` manages the application state based on actions dispatched through the reducer.

```TypeScript
new DataStore(reducer: Reducer<S>, state: S): DataStore
```

--------------------------------

### Removing First Matching Element with Predicate in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This example demonstrates how to use `ArrayExt.removeFirstWhere` to remove the first element that satisfies a given predicate function. It shows how to define a predicate and apply it with optional start and stop indices, returning the removed element's index and value.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

function isEven(value: number): boolean {
  return value % 2 === 0;
}

let data = [0, 12, 23, 39, 14, 12, 75];
ArrayExt.removeFirstWhere(data, isEven);     // { index: 0, value: 0 }
ArrayExt.removeFirstWhere(data, isEven, 2);  // { index: 3, value: 14 }
ArrayExt.removeFirstWhere(data, isEven, 4);  // { index: -1, value: undefined }
```

--------------------------------

### Defining startPlugins Property for IStartOptions (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/interfaces/application.istartoptions.html

Defines an optional array of strings, `startPlugins`, within the `IStartOptions` interface. This property specifies a list of plugin IDs that should be activated during application startup. These plugins will be activated in addition to any plugins marked for `autoStart`.

```TypeScript
startPlugins: string[]
```

--------------------------------

### Loading Search Script Locally (JavaScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/keyboard/globals.html

This JavaScript snippet dynamically loads the 'search.js' script. It's specifically designed to run when the documentation is accessed directly via the 'file:' protocol, ensuring search functionality is available even when not served from a web server.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Parent Widget in PhosphorJS Layout (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/singletonlayout.html

Retrieves the parent widget associated with the current layout. This property is automatically managed by the framework when the layout is installed on a parent widget and should not be set directly by user code. It returns the parent `Widget` or `null` if no parent is assigned.

```TypeScript
get parent(): Widget | null
```

--------------------------------

### Getting Parent Widget of PhosphorJS Layout (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/gridlayout.html

This accessor retrieves the parent widget to which the layout is attached. It returns a `Widget` instance or `null` if no parent is set. This property is automatically managed when the layout is installed on a parent widget and should not be set directly by user code.

```TypeScript
get parent(): [Widget](widget.html) | null
```

--------------------------------

### Constructing Application Instance (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/classes/application.html

Defines the constructor for the `Application` class, which takes an `IOptions` object as a parameter. This constructor initializes the application with the provided configuration, setting up its core components and behaviors.

```TypeScript
new Application(options: IOptions<T>): Application
```

--------------------------------

### Rotating Array Elements with ArrayExt.rotate (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This example demonstrates how to use the `ArrayExt.rotate` function to perform in-place rotation of array elements. It shows various scenarios including positive and negative delta values, and rotation within a specified range (start and stop indices). The function modifies the array directly.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

let data = [0, 1, 2, 3, 4];
ArrayExt.rotate(data, 2);        // [2, 3, 4, 0, 1]
ArrayExt.rotate(data, -2);       // [0, 1, 2, 3, 4]
ArrayExt.rotate(data, 10);       // [0, 1, 2, 3, 4]
ArrayExt.rotate(data, 9);        // [4, 0, 1, 2, 3]
ArrayExt.rotate(data, 2, 1, 3);  // [4, 2, 0, 1, 3]
```

--------------------------------

### Finding Last Value with Predicate in PhosphorJS ArrayExt (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This snippet illustrates the usage of `ArrayExt.findLastValue` to retrieve the last element in an array that satisfies a specified predicate function. It provides examples demonstrating searches with different `start` and `stop` parameters, including scenarios where the value is found, not found, or the search range is adjusted.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

function isEven(value: number): boolean {
  return value % 2 === 0;
}

let data = [1, 2, 3, 4, 3, 2, 1];
ArrayExt.findLastValue(data, isEven);        // 2
ArrayExt.findLastValue(data, isEven, 4);     // 4
ArrayExt.findLastValue(data, isEven, 0);     // undefined
ArrayExt.findLastValue(data, isEven, 0, 1);  // 2
```

--------------------------------

### Initialize Search Script | JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/modules/tabpanel.widget.html

This JavaScript snippet conditionally loads a search script. It checks if the current page is accessed via the `file:` protocol, and if so, dynamically injects a `<script>` tag to load `search.js` from the `../assets/js/` directory. This is typically used for local documentation viewing.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Finding Last Index with Predicate in PhosphorJS ArrayExt (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This snippet demonstrates how to use `ArrayExt.findLastIndex` to find the index of the last element in an array that satisfies a given predicate function. It shows examples with and without specifying `start` and `stop` search range parameters, including cases where no match is found or the search wraps.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

function isEven(value: number): boolean {
  return value % 2 === 0;
}

let data = [1, 2, 3, 4, 3, 2, 1];
ArrayExt.findLastIndex(data, isEven);        // 5
ArrayExt.findLastIndex(data, isEven, 4);     // 3
ArrayExt.findLastIndex(data, isEven, 0);     // -1
ArrayExt.findLastIndex(data, isEven, 0, 1);  // 5
```

--------------------------------

### Removing Elements by Predicate with ArrayExt in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This snippet demonstrates how to use `ArrayExt.removeAllWhere` to remove all elements from an array that satisfy a given predicate function. The predicate `fn` takes a value and its index, returning a boolean. It shows examples of removing even numbers and negative numbers within specified ranges, with optional `start` and `stop` indices.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

function isEven(value: number): boolean {
  return value % 2 === 0;
}

function isNegative(value: number): boolean {
  return value < 0;
}

let data = [0, 12, -13, -9, 23, 39, 14, -15, 12, 75];
ArrayExt.removeAllWhere(data, isEven);            // 4
ArrayExt.removeAllWhere(data, isNegative, 0, 3);  // 2
```

--------------------------------

### Constructing a Menu instance in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Initializes a new Menu widget with specified options. It overrides the base Widget constructor. The `options` parameter defines the initial configuration for the menu, such as its command registry and renderer.

```TypeScript
import { Menu } from '@phosphor/widgets';
import { CommandRegistry } from '@phosphor/commands';

const commands = new CommandRegistry();
const options = { commands };
const menu = new Menu(options);
```

--------------------------------

### Constructing a Widget - TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/widget.html

Initializes a new instance of the `Widget` class. It accepts an optional `options` object to configure the widget upon creation. This is the primary way to instantiate a `Widget`.

```TypeScript
new Widget(options?: IOptions): Widget
```

--------------------------------

### Enable Local Search Script for File Protocol

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/dockpanel.overlay.html

This JavaScript snippet checks if the current page is loaded using the 'file:' protocol (i.e., from a local file system). If true, it dynamically injects a script named 'search.js' from the '../assets/js/' directory into the document. This is typically used in locally generated documentation to enable search functionality.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Removing First Occurrence of Value with ArrayExt in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This snippet shows how to use `ArrayExt.removeFirstOf` to remove the first occurrence of a specific value from an array, using strict `===` equality for comparison. It returns the index of the removed value or `-1` if not found. Examples include successful removal, attempting to remove a non-existent value, and searching within a specified range using `start` and `stop` indices.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

let data = [0, 12, 23, 39, 14, 12, 75];
ArrayExt.removeFirstOf(data, 12);        // 1
ArrayExt.removeFirstOf(data, 17);        // -1
ArrayExt.removeFirstOf(data, 39, 3);     // -1
ArrayExt.removeFirstOf(data, 39, 3, 2);  // 2
```

--------------------------------

### Modifying Array Elements with splice (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/jsonarray.html

This method changes the contents of an array-like structure by removing or replacing existing elements and/or adding new elements in place. It returns an array containing the deleted elements. The first overload removes `deleteCount` elements starting from `start`. The second overload also inserts `items` at the `start` position after deleting `deleteCount` elements.

```TypeScript
splice(start: number, deleteCount?: number): JSONValue[]
```

```TypeScript
splice(start: number, deleteCount: number, ...items: JSONValue[]): JSONValue[]
```

--------------------------------

### Injecting Search Script for Local File Access - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/panellayout.layout.ioptions.html

This JavaScript snippet checks if the current page is loaded via the 'file:' protocol. If true, it dynamically injects a script tag to load 'search.js', enabling search functionality for locally hosted documentation.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Dynamically Loading Search Script in JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/menu.widget.ioptions.html

This JavaScript snippet dynamically injects a search script into the document if the current page is loaded via the 'file:' protocol. This is typically used for local development or offline viewing where a web server might not be serving the files.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Starting Open Timer in PhosphorJS Menu (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Starts a timer to open the menu, but only if an open timer is not already active. This prevents multiple open timers from being initiated. It returns void and has no parameters.

```TypeScript
_startOpenTimer(): void
```

--------------------------------

### Loading Search Script in File Protocol - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/datastore/index.html

This JavaScript snippet dynamically loads the 'search.js' script when the page is accessed via the 'file:' protocol. This is typically used for local development or offline viewing of documentation to enable search functionality.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Starting Close Timer in PhosphorJS Menu (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Starts a timer to close the menu, but only if a close timer is not already active. This prevents multiple close timers from being initiated. It returns void and has no parameters.

```TypeScript
_startCloseTimer(): void
```

--------------------------------

### Inserting Elements at Start of JSONArray in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/jsonarray.html

This method inserts new elements at the start of an array. It takes a rest parameter `items` which are the elements to insert, and returns the new length of the array. It is inherited from `Array.unshift`.

```TypeScript
unshift(...items: JSONValue[]): number
```

--------------------------------

### Dynamically Loading Search Script in File Protocol - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/commandpalette.iitemoptions.html

This JavaScript snippet dynamically injects a search script (`search.js`) into the document if the current page is being accessed via the `file:` protocol. This is typically used for local development or offline viewing of documentation to ensure search functionality works correctly.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Constructing a Panel Instance - TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/panel.html

Initializes a new instance of the `Panel` class. It accepts an optional `options` parameter, which is an `IOptions` object, used for configuring the panel upon creation. This constructor overrides the base `Widget` constructor.

```TypeScript
new Panel(options?: IOptions): Panel
```

--------------------------------

### Initializing Private Row Start Positions in PhosphorJS GridLayout (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/gridlayout.html

This private member `_rowStarts` is an array of numbers, initialized as an empty array. It is likely used internally by the `GridLayout` to store the starting pixel coordinates or relative positions of each row within the layout.

```TypeScript
_rowStarts: number[] = []
```

--------------------------------

### Dynamically Loading Search Script for Local Files - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/keyboard/index.html

This JavaScript snippet checks if the current document is loaded via the 'file:' protocol. If true, it dynamically writes a <script> tag to the document, loading 'assets/js/search.js'. This is a common pattern for enabling client-side functionality, like search, when viewing documentation directly from the filesystem without a web server.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Extracting Section with slice (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/jsonarray.html

This method returns a shallow copy of a portion of an array-like structure into a new array object selected from `start` to `end` (end not included). It is inherited from `Array.slice`. `start` specifies the beginning index (optional), and `end` specifies the ending index (optional).

```TypeScript
slice(start?: number, end?: number): JSONValue[]
```

--------------------------------

### Constructing ContextMenu in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/contextmenu.html

Initializes a new instance of the `ContextMenu` class. It takes an `options` object to configure the menu. The `options` parameter is of type `IOptions` and defines the initial settings for the context menu.

```TypeScript
new ContextMenu(options: IOptions): ContextMenu
```

--------------------------------

### Reversing Array In-Place with Phosphor ArrayExt (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This snippet illustrates the usage of `ArrayExt.reverse` to reverse the elements of an array-like object in-place. It supports optional `start` and `stop` parameters to reverse only a specific range of elements. Negative `start` or `stop` values are interpreted as offsets from the end of the array. The function has linear complexity and returns `void`.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

let data = [0, 1, 2, 3, 4];
ArrayExt.reverse(data, 1, 3);  // [0, 3, 2, 1, 4]
ArrayExt.reverse(data, 3);     // [0, 3, 2, 4, 1]
ArrayExt.reverse(data);        // [1, 4, 2, 3, 0]
```

--------------------------------

### Loading Search Script in JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/signaling/globals.html

Dynamically loads the search.js script if the current page is accessed via the file protocol, typically used for local development or offline viewing of documentation.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Removing Last Element by Predicate with Phosphor ArrayExt (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/modules/arrayext.html

This snippet demonstrates how to use `ArrayExt.removeLastWhere` to remove the last occurrence of an element that satisfies a given predicate function. The function searches within a specified range (defined by `start` and `stop` indices) and returns an object containing the `index` and `value` of the removed element, or `-1` and `undefined` if not found. The search can wrap around the array if `start < stop`.

```TypeScript
import { ArrayExt } from '@phosphor/algorithm';

function isEven(value: number): boolean {
  return value % 2 === 0;
}

let data = [0, 12, 23, 39, 14, 12, 75];
ArrayExt.removeLastWhere(data, isEven);        // { index: 5, value: 12 }
ArrayExt.removeLastWhere(data, isEven, 2);     // { index: 1, value: 12 }
ArrayExt.removeLastWhere(data, isEven, 2, 1);  // { index: -1, value: undefined }
```

--------------------------------

### Conditional Search Script Loading - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/virtualdom/modules/virtualdom.html

This JavaScript snippet conditionally loads a search script (`search.js`) if the current page is accessed via the `file:` protocol. This is typically used in local documentation builds where search functionality might require specific script loading paths.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Menu Items in PhosphorJS

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves a read-only array containing all the menu items currently present in the PhosphorJS Menu.

```TypeScript
get items(): ReadonlyArray<IItem>
```

--------------------------------

### Initializing Application Delegate (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/classes/application.html

Initializes a private `PromiseDelegate<void>` instance. This delegate is typically used to manage the asynchronous lifecycle of the application, resolving once certain startup conditions or processes are complete.

```TypeScript
_delegate: PromiseDelegate<void> = new PromiseDelegate<void>()
```

--------------------------------

### Getting Row Spacing in PhosphorJS GridLayout (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/gridlayout.html

Retrieves the spacing between rows in the grid layout.

```TypeScript
get rowSpacing(): number
```

--------------------------------

### Loading Search Script for Local Files - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/index.html

This JavaScript snippet conditionally loads a search script ('assets/js/search.js') if the current page is accessed via the 'file:' protocol. This is typically used to enable search functionality when viewing documentation directly from the local filesystem, bypassing potential security restrictions or server requirements.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting String Representation of JSONArray in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/jsonarray.html

This method returns a string representation of an array. It is inherited from `Array.toString`.

```TypeScript
toString(): string
```

--------------------------------

### Loading Search Script for Local Files - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/interfaces/iplugin.html

This JavaScript snippet conditionally loads a search script (`search.js`) when the current page is accessed via the `file:` protocol. It ensures that search functionality is available even when browsing documentation locally, typically for development or offline use.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Iterator for RetroArrayIterator in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/classes/retroarrayiterator.html

Returns an iterator over the object's values. For `RetroArrayIterator`, this method typically returns `this` itself, as the class is designed to be an iterator.

```TypeScript
iter(): IIterator<T>
```

--------------------------------

### Dynamically Loading Search Script in JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/docklayout.ilayoutconfig.html

This JavaScript snippet dynamically loads the `search.js` script into the document if the current page is accessed via the `file:` protocol. This is typically used for local development or offline viewing to ensure search functionality is available.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Dynamically Load Search Script for Local Files

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/modules/menubar.widget.html

This JavaScript snippet checks if the current document is loaded via the `file:` protocol. If true, it dynamically injects a `<script>` tag to load `search.js`, enabling search functionality for local or offline documentation viewing.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Widget Disposed Signal in PhosphorJS

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves an `ISignal` that is emitted when the PhosphorJS Widget instance is disposed. This property is inherited from the base `Widget` class.

```TypeScript
get disposed(): ISignal<this, void>
```

--------------------------------

### Getting DockPanel Renderer in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/dockpanel.html

Retrieves the renderer instance used by the dock panel for drawing and rendering operations.

```TypeScript
get renderer(): IRenderer
```

--------------------------------

### Initializing PanelLayout in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/panellayout.html

Performs layout initialization, which requires the parent widget. This method overrides the `init` method from the `Layout` class to ensure proper setup within the panel layout context.

```TypeScript
init(): void
```

--------------------------------

### Getting Signal Exception Handler in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/signaling/classes/signal.html

Retrieves the currently configured exception handler for signals. The default handler is `console.error`.

```TypeScript
getExceptionHandler(): ExceptionHandler
```

--------------------------------

### Loading Search Script for File Protocol - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/docklayout.html

This JavaScript snippet checks if the current page is accessed via the 'file:' protocol. If so, it dynamically injects a <script> tag to load 'search.js' from the '../assets/js/' directory. This is typically used to enable search functionality when viewing documentation or web pages directly from the local filesystem.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Loading Search Script - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/domutils/index.html

This JavaScript snippet conditionally loads the 'search.js' script. It checks if the current page's protocol is 'file:', which typically indicates the page is being viewed locally from the file system. If true, it dynamically writes a script tag to include 'assets/js/search.js', enabling search functionality for local documentation.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting an Iterator from MapIterator in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/algorithm/classes/mapiterator.html

Returns an iterator over the `MapIterator`'s values. This method is part of the `IIterator` interface implementation, allowing the `MapIterator` itself to be iterated over.

```TypeScript
iter(): IIterator<U>
```

--------------------------------

### Conditional Search Script Loading - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/docklayout.itabareaconfig.html

This JavaScript snippet conditionally loads the 'search.js' script. It checks if the current document is accessed via the 'file:' protocol, which is common for local development or offline documentation viewing, and dynamically injects the script into the document.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Defining BeforeAttach Message in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/modules/widget.msg.html

This singleton message is dispatched to a widget just before it is attached to the DOM. It provides an opportunity for the widget to perform any pre-attachment setup or validation.

```TypeScript
BeforeAttach: Message = new Message('before-attach')
```

--------------------------------

### Initializing Application Service Map (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/classes/application.html

Initializes a private `Map` that stores service instances, mapping `Token` objects to string identifiers. This map is fundamental for the application's dependency injection system, enabling services to be resolved and provided to plugins.

```TypeScript
_serviceMap: Map<Token<any>, string> = Private.createServiceMap()
```

--------------------------------

### Getting SplitPanel Spacing (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/splitpanel.html

Retrieves the inter-element spacing for the split panel. This property returns a number representing the space between child elements.

```TypeScript
get spacing(): number
```

--------------------------------

### Getting Root Menu in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves the topmost (root) menu in the current menu hierarchy. This provides access to the base menu from which all submenus originate.

```typescript
get rootMenu(): Menu
```

--------------------------------

### Dynamically Loading Search Script (JavaScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/dockpanel.ioverlay.html

This snippet dynamically injects a JavaScript search script into the document if the page is accessed via the 'file:' protocol. This is typically used for local development or offline viewing to enable search functionality.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Loading Search Script for Local Files - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/collections/index.html

This JavaScript snippet dynamically loads the 'search.js' script when the documentation is accessed directly from a local file system (using the 'file:' protocol). This is typically used for offline viewing or development environments to enable search functionality.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting activeIndex Property in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves the index of the currently active menu item. A value of -1 indicates that no item is currently active within the menu.

```TypeScript
const menuInstance = new Menu({ commands: new CommandRegistry() });
const index = menuInstance.activeIndex;
```

--------------------------------

### Load Search Script for File Protocol - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/application/interfaces/application.ioptions.html

This JavaScript snippet conditionally loads a search script (`search.js`) into the document. It executes only when the current page is accessed using the `file:` protocol, which is common for local documentation viewing or development environments without a web server.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting TabBar Titles Array (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/tabbar.html

Retrieves a read-only array containing all title objects currently present in the tab bar.

```TypeScript
get titles(): ReadonlyArray<[Title](title.html)<T\>>
```

--------------------------------

### Conditionally Load Search Script - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/splitpanel.panel.ioptions.html

This JavaScript snippet checks if the current document is accessed via the `file:` protocol. If true, it dynamically injects a `<script>` tag to load `search.js`, enabling local search functionality. This is common for offline documentation viewing.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Widget ID in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/scrollbar.html

Retrieves the `id` attribute of the widget's DOM node as a string. This accessor is inherited from the `Widget` class.

```TypeScript
get id(): string
```

--------------------------------

### Dynamically Loading Search Script - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/commands/interfaces/commandregistry.ikeybindingchangedargs.html

This JavaScript snippet dynamically injects a script tag into the document. It checks if the current page is loaded from a local file system (using `file:` protocol) and, if so, loads a search-related JavaScript file. This is typically used for local development or documentation viewing where server-side includes might not be available.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Leaf Menu in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves the innermost (leaf) menu within a menu hierarchy. This property is useful for navigating or interacting with the deepest active menu.

```typescript
get leafMenu(): Menu
```

--------------------------------

### Conditionally Loading Search Script - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/virtualdom/index.html

This JavaScript snippet dynamically injects a script tag into the document. It checks if the page is accessed via the 'file:' protocol, which is common for local documentation viewing. If true, it loads 'assets/js/search.js' to enable search functionality.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Widget Layout in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves the layout object associated with a widget. The layout is single-use and cannot be changed after its initial assignment. It is automatically disposed when the widget is disposed.

```typescript
get layout(): Layout | null
```

--------------------------------

### Getting and Setting Widget ID in PhosphorJS

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves or sets the 'id' attribute of the DOM node associated with a PhosphorJS Widget. This property is inherited from the base `Widget` class.

```TypeScript
get id(): string
```

```TypeScript
set id(value: string): void
```

--------------------------------

### Creating q Factory using PhosphorJS h.bind (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/virtualdom/modules/h.html

This snippet defines a constant `q` which acts as a factory function for creating `<q>` HTML elements within the PhosphorJS virtual DOM. It uses `h.bind` to associate the 'q' tag with the `h` utility, returning an `IFactory` instance for virtual node creation. This simplifies rendering short quotation elements.

```TypeScript
q: IFactory = h.bind(undefined, 'q')
```

--------------------------------

### Getting Child Menu in PhosphorJS

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves the child menu associated with the current PhosphorJS Menu. This property returns `null` unless the menu currently has an open submenu.

```TypeScript
get childMenu(): Menu | null
```

--------------------------------

### Loading Search Script on File Protocol - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/commands/globals.html

This JavaScript snippet conditionally loads the 'search.js' script. It checks if the current page is accessed via the 'file:' protocol, which is common for local documentation viewing, and dynamically injects the script to enable search functionality.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Iterable Iterator of JSONArray Values in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/jsonarray.html

This method returns an iterable iterator of values in the array, allowing for iteration over its elements. It is inherited from `Array.values`.

```TypeScript
values(): IterableIterator<JSONValue>
```

--------------------------------

### Loading Search Script for Local Files - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menubar.html

This JavaScript snippet checks if the current page is accessed via the 'file:' protocol. If true, it dynamically injects a <script> tag into the document to load 'search.js', which is typically used for enabling search functionality when viewing documentation locally from the file system.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Dynamically Loading Search Script in JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/globals.html

This JavaScript snippet dynamically injects a search script into the document if the page is accessed via the `file:` protocol. This is typically used for local development or offline viewing to enable search functionality without requiring a web server.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Array Keys with keys in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/jsonarray.html

This method returns an `IterableIterator` of the keys (indices) in the array. It provides a way to iterate over the indices of the array elements.

```TypeScript
keys(): IterableIterator<number>
```

--------------------------------

### Declaring BeforeAttach Message in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/modules/panel.widget.msg.html

This snippet declares a singleton 'before-attach' message. This message is sent to a widget just before it is attached to the DOM or its parent widget, allowing for pre-attachment setup.

```TypeScript
BeforeAttach: Message = new Message('before-attach')
```

--------------------------------

### Conditionally Loading Search Script - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/commands/interfaces/commandregistry.ikeybinding.html

This JavaScript snippet dynamically loads the 'search.js' script. It checks if the current document's protocol is 'file:', indicating it's being accessed directly from the local filesystem. If so, it injects a script tag into the document to enable search functionality, typically for offline documentation viewing.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Conditional Script Loading for Local Files - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/layout.ioptions.html

This JavaScript snippet conditionally loads a search script (`search.js`) into the document if the current page is being accessed via the `file:` protocol. This is a common pattern for enabling search functionality in locally hosted documentation or web applications.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Mnemonic Index for Title in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/title.html

Retrieves the mnemonic index for the title. This accessor returns a number representing the keyboard mnemonic. The default value is `-1`.

```TypeScript
get mnemonic(): number
```

--------------------------------

### Getting Scrollbar Orientation in PhosphorJS - TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/scrollbar.html

Retrieves the orientation (e.g., horizontal or vertical) of a PhosphorJS scroll bar. Returns an `Orientation` enum value.

```TypeScript
get orientation(): Orientation
```

--------------------------------

### Dynamically Loading Search Script - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/splitpanel.renderer.html

This JavaScript snippet checks if the current document is accessed via the `file:` protocol. If true, it dynamically writes a `<script>` tag into the document to load `search.js`, which is typically used to enable search functionality in locally browsed documentation.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Injecting Search Script on File Protocol - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/datastore/globals.html

This JavaScript snippet dynamically injects the 'search.js' script into the document if the page is loaded via the 'file:' protocol. This is typically used for local development or documentation viewing where a web server might not be present, ensuring search functionality is available.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><\/script>');
```

--------------------------------

### Getting Widget Dataset in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/scrollbar.html

Retrieves the `DOMStringMap` representing the dataset attributes for the widget's DOM node. This accessor is inherited from the `Widget` class.

```TypeScript
get dataset(): DOMStringMap
```

--------------------------------

### Getting Parent Menu in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/menu.html

Retrieves the parent menu of the current menu. This property returns null unless the current menu is an open submenu within a hierarchy.

```typescript
get parentMenu(): Menu | null
```

--------------------------------

### Loading Search Script in JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/commands/index.html

This JavaScript snippet conditionally loads a search script (`search.js`) into the document. It checks if the current page is accessed via the `file:` protocol, which is common for local documentation viewing, and if so, dynamically injects the script.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Row Count in PhosphorJS GridLayout (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/gridlayout.html

Retrieves the current number of rows configured in the grid layout. The minimum row count is 1.

```TypeScript
get rowCount(): number
```

--------------------------------

### Constructor: KeycodeLayout (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/keyboard/classes/keycodelayout.html

Initializes a new instance of `KeycodeLayout` with a human-readable name and a mapping of keycodes to key values. This constructor sets up the internal data structures for key lookup.

```TypeScript
new KeycodeLayout(name: string, codes: CodeMap): KeycodeLayout
```

--------------------------------

### Loading Search Script in JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/disposable/classes/disposableset.html

This client-side JavaScript snippet conditionally loads a search script (`search.js`) if the current page is accessed via the `file:` protocol. This is typically used for enabling search functionality in locally hosted documentation.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting List Length in PhosphorJS LinkedList (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/collections/classes/linkedlist.html

Retrieves the current number of elements in the linked list. This operation provides the list's size with constant time complexity.

```TypeScript
get length(): number
```

--------------------------------

### Defining BeforeAttach Message in Phosphor Widgets

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/modules/menu.widget.msg.html

This snippet defines a singleton message that is sent to a widget just before it is attached to the DOM. It provides an opportunity for the widget to perform any pre-attachment setup or validation.

```TypeScript
BeforeAttach: Message = new Message('before-attach')
```

--------------------------------

### Conditional Search Script Loading - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/gridlayout.icellconfig.html

This JavaScript snippet conditionally loads the search.js script if the current document is being accessed via the 'file:' protocol, typically used for local file system browsing. This ensures search functionality is available in offline or local documentation environments.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Loading Search Script for Local Files - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/jsonobject.html

This JavaScript snippet checks if the current page is loaded via the 'file:' protocol. If so, it dynamically injects a script tag to load 'search.js', which is typically used for local development or documentation viewing where a web server might not be present.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Iterating Widget Children in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/panel.html

Creates and returns an iterator over the children of the widget. For children to exist, the widget must have a populated layout. If no layout is installed, the returned iterator will be empty.

```TypeScript
children(): IIterator<Widget>
```

--------------------------------

### Getting Command Usage Help in PhosphorJS (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/commands/classes/commandregistry.html

Retrieves the usage help text for a specific command from the PhosphorJS command registry. It takes the command ID and optional arguments, returning the usage text string or an empty string if the command is not registered.

```TypeScript
usage(id: string, args?: ReadonlyJSONObject): string
```

--------------------------------

### Creating main Factory using PhosphorJS h.bind (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/virtualdom/modules/h.html

This snippet defines a constant `main` which acts as a factory function for creating `<main>` HTML elements within the PhosphorJS virtual DOM. It uses `h.bind` to associate the 'main' tag with the `h` utility, returning an `IFactory` instance for virtual node creation. This simplifies rendering main content elements.

```TypeScript
main: IFactory = h.bind(undefined, 'main')
```

--------------------------------

### Slicing ReadonlyJSONValue Array in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/coreutils/interfaces/readonlyjsonarray.html

This method returns a section of an array. It accepts optional start and end parameters to define the portion of the array to return. It is inherited from ReadonlyArray.slice.

```TypeScript
slice(start?: number, end?: number): [ReadonlyJSONValue](../globals.html#readonlyjsonvalue)[]
```

--------------------------------

### Conditional Search Script Loading in Documentation

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/keyboard/classes/keycodelayout.html

This JavaScript snippet checks if the documentation is being viewed via the 'file:' protocol. If true, it dynamically injects a <script> tag to load a search functionality script, typically used for local documentation browsing.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Label for Title in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/title.html

Retrieves the current label string associated with the title. This accessor returns the text displayed as the title. The default value is an empty string.

```TypeScript
get label(): string
```

--------------------------------

### Get Deprecated Icon Property for PhosphorJS Title (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/title.html

Retrieves the deprecated icon property for the title. This property is superseded by `iconClass` and should no longer be used for new implementations.

```TypeScript
get icon(): string
```

--------------------------------

### Conditionally Loading Search Script (JavaScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/widget.html

This JavaScript snippet checks if the current document is loaded via the `file:` protocol. If true, it dynamically injects a `<script>` tag to load `search.js`, enabling search functionality for local documentation files.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting the Caption of a Title in TypeScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/title.html

Retrieves the current caption string for the title. The caption is a descriptive text associated with the title, defaulting to an empty string if not explicitly set.

```TypeScript
get caption(): string
```

--------------------------------

### Dynamically Loading Search Script - JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/modules/splitpanel.panel.html

This JavaScript snippet checks if the current document is loaded using the 'file:' protocol. If true, it dynamically injects a script tag into the document to load 'search.js'. This is typically used to enable search functionality when viewing documentation directly from the local filesystem without a web server.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Loading Search Script Conditionally (JavaScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/interfaces/commandpalette.ioptions.html

This JavaScript snippet conditionally loads the `search.js` script. It checks if the current page protocol is 'file:' (i.e., opened directly from the file system) and, if so, dynamically injects the script into the document.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="../assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Tab Moved Signal (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/tabbar.html

Retrieves a signal emitted when a tab is moved by user interaction. This signal is not emitted for programmatic tab movements.

```TypeScript
get tabMoved(): ISignal<this, [ITabMovedArgs](../interfaces/tabbar.itabmovedargs.html)<T\>>
```

--------------------------------

### Getting SplitPanel Orientation (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/splitpanel.html

Retrieves the layout orientation for the split panel. This property returns an `Orientation` enum value, defining how the panel's children are arranged.

```TypeScript
get orientation(): Orientation
```

--------------------------------

### Conditional Search Script Loading (JavaScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/disposable/index.html

This JavaScript code dynamically injects a `<script>` tag to load `search.js` into the document. It executes only when the page is accessed directly from the file system (e.g., `file://` protocol), typically for local documentation viewing, enabling search functionality without a web server.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Dynamically Loading Search Script in JavaScript

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/signaling/index.html

This JavaScript snippet checks if the current page is loaded from a local file system (using the `file:` protocol) and, if so, dynamically injects a `<script>` tag to load `search.js`. This is typically used for local development or documentation viewing where a web server might not be present, ensuring search functionality is available.

```JavaScript
if (location.protocol == 'file:') document.write('<script src="assets/js/search.js"><' + '/script>');
```

--------------------------------

### Getting Widget Hidden State (TypeScript)

Source: https://github.com/phosphorjs/phosphor/blob/master/docs/api/widgets/classes/splitpanel.html

Tests whether a widget is explicitly hidden. This property is inherited from the `Widget` class and returns a boolean indicating the hidden status.

```TypeScript
get isHidden(): boolean
```