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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

The Selection.collapse() method collapses the current selection to a single point. The document is not modified. If the content is focused and editable, the caret will blink there.

Syntax

sel.collapse(node, offset);

Parameters

node
The caret location will be within this node. This value can also be set to null — if null is specified, the method will behave like Selection.removeAllRanges(), i.e. all ranges will be removed from the selection.
offset Optional
The offset in parentNode to which the selection will be collapsed. If not specified, the default value 0 is used.

Examples

/* Place the caret at the beginning of an HTML document's body. */
var body = document.getElementsByTagName("body")[0];
window.getSelection().collapse(body,0);

Specifications

Specification Status Comment
Selection API
The definition of 'Selection.collapse()' in that specification.
Working Draft  
HTML Editing APIs
The definition of 'Selection.collapse()' in that specification.
Editor's Draft Initial definition

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support (Yes) (Yes) (Yes) 9.0 (Yes) (Yes)
node parameter is nullable; offset parameter is optional (Yes) ? 55 (55) ? (Yes) (Yes)
Feature Android Edge Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support ? (Yes) (Yes) ? ? (Yes)
node parameter is nullable; offset parameter is optional ? ? 55.0 (55) ? ? (Yes)

See also

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 最終更新者: chrisdavidmills,