DocumentOrShadowRoot.caretPositionFromPoint()

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The caretPositionFromPoint() property of the DocumentOrShadowRoot interface returns a CaretPosition object, containing the DOM node, along with the caret and caret's character offset within that node.

Syntax

var caretPosition = document.caretPositionFromPoint(float x, float y);

Parameters

x
The horizontal coordinate of a point.
y
The vertical coordinate of a point.

Returns

CaretPosition object.

Example

This example inserts line breaks wherever you click. The code for it is below the demo.  

Demo

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.nodeType == 3) {
    var replacement = textNode.splitText(offset);
    var br = document.createElement('br');
    textNode.parentNode.insertBefore(br, replacement);
  }
}

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

Specifications

Specification Status Comment
Shadow DOM
The definition of 'DocumentOrShadowRoot' in that specification.
Working Draft Initial definition.

Browser Compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support53 Yes Yes Yes40 Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support5353 Yes Yes40 Yes6.0

Document Tags and Contributors

 Contributors to this page: fscholz, chrisdavidmills, bunnybooboo, jpmedley
 Last updated by: fscholz,