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Showing content from https://webplatform.github.io/docs/dom/Selection/rangeCount below:

rangeCount · WebPlatform Docs

Returns the number of ranges in a selection

Property of dom/Selectiondom/Selection

Note: This property is read-only.

var rangecount = selObj.rangeCount;

Returns an object of type NumberNumber

The number of ranges in a selection.

var selObj=window.selection();
var rangecount=selObj.rangeCount;

Windows Internet Explorer 9-11 does not currently support multiple or disjointed selections in standards mode. This property always returns a 1 with a valid selection. It returns a 0 if removeRange or removeAllRanges have been applied, though calling isCollapsed is recommended instead to detect an empty range.

Before the user has clicked a freshly loaded page, the rangeCount is 0. A user can normally only select one range at a time, so the rangeCount will usually be 1. Scripting can be used (currently) in Gecko to make the selection contain more than 1 range.

• HTML5 A vocabulary and associated APIs for HTML and XHTML, Section 7.6.1

• Mozilla Developer Network : [Selection.rangeCount Article]

• Microsoft Developer Network: [rangeCount Property Article]

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