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82 lines
2.3 KiB
Markdown
82 lines
2.3 KiB
Markdown
# Range
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`Range` objects are a set of points that refer to a specific span of a Slate document. They can define a span inside a single node or they can span across multiple nodes. The editor's `selection` is stored as a range.
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```typescript
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interface Range {
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anchor: Point
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focus: Point
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}
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```
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- [Static methods](range.md#static-methods)
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- [Retrieval methods](range.md#retrieval-methods)
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- [Check methods](range.md#check-methods)
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- [Transform methods](range.md#transform-methods)
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## Static methods
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### Retrieval methods
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#### `Range.edges(range: Range, options?): [Point, Point]`
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Get the start and end points of a `range`, in the order in which they appear in the document.
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Options: `{reverse?: boolean}`
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#### `Range.end(range: Range): Point`
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Get the end point of a `range`.
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#### `Range.intersection(range: Range, another: Range): Range | null`
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Get the intersection of one `range` with `another`.
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#### `Range.points(range: Range): Generator<PointEntry>`
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Iterate through all the point entries in a `range`.
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#### `Range.start(range: Range): Point`
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Get the start point of a `range`
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### Check methods
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Check some attribute of a Range. Always returns a boolean.
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#### `Range.equals(range: Range, another: Range): boolean`
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Check if a `range` is exactly equal to `another`.
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#### `Range.includes(range: Range, target: Path | Point | Range): boolean`
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Check if a `range` includes a path, a point, or part of another range.
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#### `Range.isBackward(range: Range): boolean`
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Check if a `range` is backward, meaning that its anchor point appears _after_ its focus point in the document.
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#### `Range.isCollapsed(range: Range): boolean`
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Check if a `range` is collapsed, meaning that both its anchor and focus points refer to the exact same position in the document.
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#### `Range.isExpanded(range: Range): boolean`
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Check if a `range` is expanded. This is the opposite of `Range.isCollapsed` and is provided for legibility.
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#### `Range.isForward(range: Range): boolean`
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Check if a `range` is forward. This is the opposite of `Range.isBackward` and is provided for legibility.
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#### `Range.isRange(value: any): value is Range`
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Check if a `value` implements the `Range` interface.
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### Transform methods
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#### `Range.transform(range: Range, op: Operation, options): Range | null`
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Transform a `range` by an `op`.
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Options: `{affinity: 'forward' | 'backward' | 'outward' | 'inward' | null}`
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