Element: hasPointerCapture() method
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2020.
Thuộc tính hasPointerCapture() method of the
Element interface checks whether the element on which it is invoked has
pointer capture for the pointer identified by the given pointer ID.
Cú pháp
js
hasPointerCapture(pointerId)
Tham số
pointerId-
The
pointerIdof aPointerEventobject.
Giá trị trả về
Một boolean value — true if the element does have pointer capture for the pointer identified by the given pointer ID, false if it doesn't.
Ví dụ
html
<div id="target">Touch this element with a pointer.</div>
js
const el = document.getElementById("target");
el.addEventListener("pointerdown", (ev) => {
// Element 'target' will receive/capture further events
el.setPointerCapture(ev.pointerId);
// …
// Check whether element still has pointer capture
const pointerCap = el.hasPointerCapture(ev.pointerId);
if (pointerCap) {
// We've still got pointer capture
} else {
// oops, we've lost pointer capture!
}
});
Đặc tả kỹ thuật
| Specification |
|---|
| Pointer Events # dom-element-haspointercapture |