Element: setPointerCapture() 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 setPointerCapture() method of the
Element interface is used to designate a specific element as the
capture target of future pointer events. Subsequent events for the pointer will
be targeted at the capture element until capture is released (via
Element.releasePointerCapture() or the
pointerup event is fired).
See pointer events for an overview and examples of how pointer capture works.
Cú pháp
setPointerCapture(pointerId)
Tham số
pointerId-
The
pointerIdof aPointerEventobject.
Giá trị trả về
None (undefined).
Ngoại lệ
NotFoundErrorDOMException-
Thrown if
pointerIddoes not match any active pointer.
Ví dụ
Ví dụ này sets pointer capture on a <div> when you press down on
it. This lets you slide the element horizontally, even when your pointer moves outside of
its boundaries.
HTML
<div id="slider">SLIDE ME</div>
CSS
div {
width: 140px;
height: 50px;
display: flex;
align-items: center;
justify-content: center;
background: #ffbbee;
touch-action: none;
}
JavaScript
const slider = document.getElementById("slider");
function beginSliding(e) {
slider.onpointermove = slide;
slider.setPointerCapture(e.pointerId);
}
function stopSliding(e) {
slider.onpointermove = null;
slider.releasePointerCapture(e.pointerId);
}
function slide(e) {
slider.style.transform = `translate(${e.clientX - 70}px)`;
}
slider.onpointerdown = beginSliding;
slider.onpointerup = stopSliding;
Result
Đặc tả kỹ thuật
| Specification |
|---|
| Pointer Events # dom-element-setpointercapture |