### Set Auto Start Picture-in-Picture

Source: https://github.com/openharmony/interface_sdk-js/blob/master/build-tools/api_check_plugin/config/errorMaskWhiteList.txt

Enables auto start picture-in-picture when back home.

```javascript
/**
    Set if auto start picture-in-picture when back home      *
    @param { boolean } enable - Enable auto start picture-in-picture when back home      *
    @since 11      */
  setAutoStartPictureEnabled(enable: boolean): void;
```

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

### Error Mask Configuration Example

Source: https://github.com/openharmony/interface_sdk-js/blob/master/build-tools/api_check_plugin/config/errorMaskWhiteList.txt

Example of an error mask configuration entry, specifying the source file, kind of error, name, and a descriptive message.

```json
{
  "fileName": "api\/ohos.PiPWINDOW.d.ts",
  "kind": "ModuleDeclaration",
  "name": "PiPWINDOW",
  "hierarchicalRelationship": ["ModuleDeclaration", "SourceFile"],
  "text": "module'ExpectedFrameRateRange'// @ts-ignoreexporttype{ExpectedFrameRateRange};
",
  "errorMessage": "API check error of [naming errors]: This name [ExpectedFrameRateRange] should be named by small hump."
}
```

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

### console.time()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Starts a timer.

```typescript
static time(label?: string): void
```

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

### System Capability Check

Source: https://github.com/openharmony/interface_sdk-js/blob/master/api/@internal/ets/CLAUDE.md

Provides an example of checking for the availability of a specific system capability.

```typescript
if (canIUse("SystemCapability.ArkUI.ArkUI.Full")) {
  // Use the capability
}
```

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

### Update Content Size

Source: https://github.com/openharmony/interface_sdk-js/blob/master/build-tools/api_check_plugin/config/errorMaskWhiteList.txt

Update source content size to adjust PiP window aspect ratio.

```javascript
/**
    Update source content size to adjust PiP window aspect ratio.      *
    @param { number } width - Indicates the width of the content.      *
    @param { number } height - Indicates the height of the content.      *
    @throws { BusinessError } 401 - Params error, invalid width or height.      *
    @syscap SystemCapability.Window.SessionManager      *
    @since 11      */
  updateContentSize(width: number, height: number): void;
```

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

### Register Picture-in-Picture Control Listener

Source: https://github.com/openharmony/interface_sdk-js/blob/master/build-tools/api_check_plugin/config/errorMaskWhiteList.txt

Register picture-in-picture control event listener.

```javascript
/**
    Register picture-in-picture control event listener.      *
    @param {'stateChange'} type - Registration type, PiP lifecycle      */
  registerPictureInPictureListener(type: 'stateChange') 
```

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

### PiPWINDOW Module Declaration

Source: https://github.com/openharmony/interface_sdk-js/blob/master/build-tools/api_check_plugin/config/errorMaskWhiteList.txt

Declaration for the PiPWINDOW namespace, including JSDoc comments for functionality and parameters.

```typescript
/**
 * If picture-in-picture enabled in current OS.
 * @returns {boolean} true if PictureInPicture enabled, otherwise false 
 * @syscap SystemCapability.Window.SessionManager
 * @since 11
 */
function isPiPEnabled(): boolean;
/**
 * Create picture-in-picture controller 
 * @param {PiPConfiguration} config - Pa
```

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

### State Change Event Listener

Source: https://github.com/openharmony/interface_sdk-js/blob/master/build-tools/api_check_plugin/config/errorMaskWhiteList.txt

Callback for handling state change events. Used to register listeners for 'stateChange' commands.

```typescript
on({
  type: 'stateChange',
  callback: (state: PiPSState, reason: string) => void
}): void;

/*
 * Unregister picture-in-picture life-cycle event listener.
 * @param type - Registration type, 'stateChange'
 * @param callback - Used to handle 'stateChange' command
 * @syscap SystemCapability.Window.SessionManager
 * @since 11
 */
off({
  type: 'stateChange'
}): void;

/*
 * Register picture-in-picture control event listener.
 * @param type - Registration type, user action event, 'controlPanelActionEvent'
 * @param callback - Used to handle 'controlPanelActionEvent' command
 * @syscap SystemCapability.Window.SessionManager
 * @since 11
 */

```

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

### console.log()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Outputs normal logs.

```typescript
static log(message: string, ...arguments: any[]): void
```

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

### console.dir()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Prints the properties of a JavaScript object.

```typescript
static dir(dir?: Object): void
```

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

### console.dirxml()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Displays an interactive tree with the descendants of the XML element specified.

```typescript
static dirxml(...arguments: Object[]): void
```

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

### Error Mask Whitelist Configuration

Source: https://github.com/openharmony/interface_sdk-js/blob/master/build-tools/api_check_plugin/config/errorMaskWhiteList.txt

This section defines specific error codes and their corresponding descriptions, used for masking or handling errors related to the PiP (Picture-in-Picture) window functionality. It includes error codes for abnormal PiP window states, creation failures, content loading issues, and stopping the PiP window.

```plaintext
6e      * @throws { BusinessError } 1300012 - If PiP window state is abnormal.     * @throws { BusinessError } 1300013 - Create PiP window failed.     * @throws { BusinessError } 1300014 - Error when load PiP window content or show PiP window     * @throws { BusinessError } 1300015 - If window has created     * @syscap SystemCapability.Window.WindowManager     * @since 11     */
    startPiP(): Promise<void>; 
    /**     *     * Stop picture-in-picture.     *     * @returns { Promise<void> } The promise returned by the function.     * @throws { BusinessError } 1300011 - Stop PiP window failed.     * @throws { BusinessError } 1300012 - If PiP window state is abnormal.     * @throws { BusinessError } 1300015 - If window is stopping     * @syscap SystemCapability.Window.WindowManager     * @since 11     */
    stopPiP(): Promise<void>; 
```

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

### console.table()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Prints data in a table format.

```typescript
static table(tableData?: Object): void
```

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

### console.info()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Outputs information logs, an alias for console.log().

```typescript
static info(message: string, ...arguments: any[]): void
```

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

### console.warn()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Outputs warning logs.

```typescript
static warn(message: string, ...arguments: any[]): void
```

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

### Directory Structure

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Illustrates the directory structure for ETS global public APIs.

```plaintext
api/@internal/ets/
├── global.d.ts      # Global APIs (console, timer, inspector, etc.)
├── lifecycle.d.ts   # Lifecycle interfaces (Form, App, Service, Data)
├── index.d.ts       # Main entry file
└── CLAUDE.md        # Quick Start Guide (English)
```

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

### console.trace()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Prints the stack trace for the current code location.

```typescript
static trace(...arguments: Object[]): void
```

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

### Timer Operations

Source: https://github.com/openharmony/interface_sdk-js/blob/master/api/@internal/ets/CLAUDE.md

Illustrates how to use setTimeout, clearTimeout, setInterval, and clearInterval for managing timed operations.

```typescript
// One-time execution
const timerId = setTimeout(() => {
  console.log("Delayed execution");
}, 1000);
clearTimeout(timerId);

// Repeated execution
const intervalId = setInterval(() => {
  console.log("Repeated execution");
}, 1000);
clearInterval(intervalId);
```

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

### console.timeLog()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Prints the elapsed time and other data for a timer.

```typescript
static timeLog(label?: string, ...arguments: Object[]): void
```

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

### Console output

Source: https://github.com/openharmony/interface_sdk-js/blob/master/api/@internal/ets/CLAUDE.md

Demonstrates various console logging and debugging methods available in ETS.

```typescript
// Console output
console.debug("Debug message");
console.log("Log message");
console.info("Info message");
console.warn("Warning message");
console.error("Error message");

// Advanced console features
console.assert(condition, "Assertion failed");
console.count("label");
console.dir(object);
console.trace();
```

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

### Component Inspection (Testing)

Source: https://github.com/openharmony/interface_sdk-js/blob/master/api/@internal/ets/CLAUDE.md

Shows how to inspect component attributes by ID, retrieve the component tree, and send events to components.

```typescript
// Get component attributes by ID
const attributes = getInspectorByKey("componentId");

// Get entire component tree
const tree = getInspectorTree();

// Send events to components
sendEventByKey("buttonId", 10, ""); // Click event
```

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

### console.debug()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Outputs debug-level logs.

```typescript
static debug(message: string, ...arguments: any[]): void
```

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

### API Declaration Pattern

Source: https://github.com/openharmony/interface_sdk-js/blob/master/api/@internal/ets/CLAUDE.md

Illustrates the standard pattern for declaring ETS APIs, including JSDoc comments and version tags.

```typescript
/**
 * Brief description of the API.
 *
 * @param { Type } paramName - Description of parameter.
 * @returns { Type } Description of return value.
 * @throws { BusinessError } 401 - Error condition.
 * @syscap SystemCapability.Xxx.Yyy
 * @crossplatform
 * @since 10
 */
export declare function apiName(paramName: Type): Type;
```

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

### console.error()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Outputs error logs.

```typescript
static error(message: string, ...arguments: any[]): void
```

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

### console.count()

Source: https://github.com/openharmony/interface_sdk-js/blob/master/docs/api/ets/ETS_Internal_API_Knowledge_Base_CN.md

Maintains an internal counter and prints the number of times it has been called.

```typescript
static count(label?: string): void
```