接口 Selection

A Selection object represents the range of text selected by the user or the current position of the caret. To obtain a Selection object for examination or modification, call Window.getSelection().

interface Selection {
    anchorNode: null | Node;
    anchorOffset: number;
    focusNode: null | Node;
    focusOffset: number;
    isCollapsed: boolean;
    rangeCount: number;
    type: string;
    addRange(range: Range): void;
    collapse(node: null | Node, offset?: number): void;
    collapseToEnd(): void;
    collapseToStart(): void;
    containsNode(node: Node, allowPartialContainment?: boolean): boolean;
    deleteFromDocument(): void;
    empty(): void;
    extend(node: Node, offset?: number): void;
    getRangeAt(index: number): Range;
    modify(alter?: string, direction?: string, granularity?: string): void;
    removeAllRanges(): void;
    removeRange(range: Range): void;
    selectAllChildren(node: Node): void;
    setBaseAndExtent(anchorNode: Node, anchorOffset: number, focusNode: Node, focusOffset: number): void;
    setPosition(node: null | Node, offset?: number): void;
    toString(): string;
}

属性

anchorNode anchorOffset focusNode focusOffset isCollapsed rangeCount type

方法

addRange collapse collapseToEnd collapseToStart containsNode deleteFromDocument empty extend getRangeAt modify removeAllRanges removeRange selectAllChildren setBaseAndExtent setPosition toString

属性

只读anchorNode

anchorNode: null | Node

只读anchorOffset

anchorOffset: number

只读focusNode

focusNode: null | Node

只读focusOffset

focusOffset: number

只读isCollapsed

isCollapsed: boolean

只读rangeCount

rangeCount: number

只读type

type: string

方法

addRange

  • addRange(range): void

  • 参数

    返回 void

collapse

  • collapse(node, offset?): void

  • 参数

    • node: null | Node
    • 可选offset: number

    返回 void

collapseToEnd

  • collapseToEnd(): void

  • 返回 void

collapseToStart

  • collapseToStart(): void

  • 返回 void

containsNode

  • containsNode(node, allowPartialContainment?): boolean

  • 参数

    • node: Node
    • 可选allowPartialContainment: boolean

    返回 boolean

deleteFromDocument

  • deleteFromDocument(): void

  • 返回 void

empty

  • empty(): void

  • 返回 void

extend

  • extend(node, offset?): void

  • 参数

    • node: Node
    • 可选offset: number

    返回 void

getRangeAt

  • getRangeAt(index): Range

  • 参数

    • index: number

    返回 Range

modify

  • modify(alter?, direction?, granularity?): void

  • 参数

    • 可选alter: string
    • 可选direction: string
    • 可选granularity: string

    返回 void

removeAllRanges

  • removeAllRanges(): void

  • 返回 void

removeRange

  • removeRange(range): void

  • 参数

    返回 void

selectAllChildren

  • selectAllChildren(node): void

  • 参数

    返回 void

setBaseAndExtent

  • setBaseAndExtent(anchorNode, anchorOffset, focusNode, focusOffset): void

  • 参数

    • anchorNode: Node
    • anchorOffset: number
    • focusNode: Node
    • focusOffset: number

    返回 void

setPosition

  • setPosition(node, offset?): void

  • 参数

    • node: null | Node
    • 可选offset: number

    返回 void

toString

  • toString(): string

  • 返回 string

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属性
方法