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Non-standard
This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

 

The caretRangeFromPoint() method of the Document interface returns a Range object for the document fragment under the specified coordinates.

Syntax

var range = document.caretRangeFromPoint(float x, float y);

Returns

One of the following:

  • A Range.
  • Null, if x or y are negative, outside viewport, or there is no text entry node.

Parameters

x
A horizontal position within the current viewport.
y
A vertical position within the current viewport.

Example

Basic demo: When clicking in a paragraph insert a line break at the caret position:

HTML Content

<p>Lorem ipsum dolor sit amet, consetetur sadipscing elitr,
sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat,
sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum.
Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet.</p>

JavaScript Content

function insertBreakAtPoint(e) {

    var range;
    var textNode;
    var offset;

    if (document.caretPositionFromPoint) {
        range = document.caretPositionFromPoint(e.clientX, e.clientY);
        textNode = range.offsetNode;
        offset = range.offset;
        
    } else if (document.caretRangeFromPoint) {
        range = document.caretRangeFromPoint(e.clientX, e.clientY);
        textNode = range.startContainer;
        offset = range.startOffset;
    }

    // only split TEXT_NODEs
    if (textNode && textNode.nodeType == 3) {
        var replacement = textNode.splitText(offset);
        var br = document.createElement('br');
        textNode.parentNode.insertBefore(br, replacement);
    }
}

var paragraphs = document.getElementsByTagName("p");
for (i=0 ; i < paragraphs.length; i++) {
    paragraphs[i].addEventListener("click", insertBreakAtPoint, false);
}

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support431220 No15 Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support4343122015 Yes ?

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最終更新者: fscholz,