The read-only startOffset property of the AbstractRange interface returns the offset into the start node of the range's start position.


var startOffset = range.startOffset


An integer value indicating the number of characters into the Node indicated by startContainer at which the first character of the range is located.


Specification Status Comment
The definition of 'startOffset' in that specification.
Living Standard
Static Range
The definition of 'startOffset' in that specification.
Editor's Draft Initial definition.

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
startOffsetChrome No support NoEdge No support 18 — 79Firefox Full support 69IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No


Full support
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