Element.hasPointerCapture() - Web APIs 编辑
The hasPointerCapture() method of the Element interface sets whether the element on which it is invoked has pointer capture for the pointer identified by the given pointer ID.
Syntax
targetElement.hasPointerCapture(pointerId);
Parameters
pointerId- The
pointerIdof aPointerEventobject.
Return value
A Boolean value — true if the element does have pointer capture, false if it doesn't.
Examples
<html>
<script>
function downHandler(ev) {
const el = document.getElementById("target");
// Element 'target' will receive/capture further events
el.setPointerCapture(ev.pointerId);
/* ... */
// Check whether element still has pointer capture
let pointerCap = el.hasPointerCapture(ev.pointerId);
if(pointerCap) {
// We've still got pointer capture
} else {
// oops, we've lost pointer capture!
}
}
function init() {
const el = document.getElementById("target");
el.onpointerdown = downHandler;
}
</script>
<body onload="init();">
<div id="target">Touch this element with a pointer.</div>
</body>
</html>
Specifications
| Specification | Status | Comment |
|---|---|---|
| Pointer Events – Level 2 The definition of 'hasPointerCapture()' in that specification. | Recommendation |
Browser compatibility
BCD tables only load in the browser
See also
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