Document.caretPositionFromPoint()
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The caretPositionFromPoint()
property of the Document
interface returns a
CaretPosition
object, containing the DOM node, along with the caret and
caret's character offset within that node.
Syntax
caretPositionFromPoint(x, y);
Parameters
x
-
The horizontal coordinate of a point.
y
-
The vertical coordinate of a point.
Returns
A CaretPosition
object.
Example
Click anywhere in the Demo paragraph below to insert a line break at the point where you click. The code for it is below the demo.
Demo
The code below first checks for document.caretRangeFromPoint
support, but if the browser doesn't support that, the code then checks for document.caretPositionFromPoint
, and uses that instead.
JavaScript
function insertBreakAtPoint(e) {
let range;
let textNode;
let offset;
if (document.caretRangeFromPoint) {
range = document.caretRangeFromPoint(e.clientX, e.clientY);
textNode = range.startContainer;
offset = range.startOffset;
} else if (document.caretPositionFromPoint) {
range = document.caretPositionFromPoint(e.clientX, e.clientY);
textNode = range.offsetNode;
offset = range.offset;
} else {
document.body.textContent = "[This browser supports neither"
+ " document.caretRangeFromPoint"
+ " nor document.caretPositionFromPoint.]";
return;
}
// Only split TEXT_NODEs
if (textNode && textNode.nodeType == 3) {
let replacement = textNode.splitText(offset);
let br = document.createElement('br');
textNode.parentNode.insertBefore(br, replacement);
}
}
let paragraphs = document.getElementsByTagName("p");
for (let i = 0; i < paragraphs.length; i++) {
paragraphs[i].addEventListener('click', insertBreakAtPoint, false);
}
HTML
<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>
Specifications
Specification |
---|
CSSOM View Module # dom-document-caretpositionfrompoint |
Browser compatibility
BCD tables only load in the browser