Element.hasPointerCapture()

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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 pointerId of a PointerEvent object.

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.
Working Draft  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 55Edge ? Firefox Full support 59
Full support 59
Full support 41
Disabled
Disabled From version 41: this feature is behind the dom.w3c_pointer_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
IE ? Opera Full support 42Safari No support NoWebView Android Full support 55Chrome Android Full support 55Edge Mobile ? Firefox Android No support No
No support No
Full support 41
Disabled
Disabled From version 41: this feature is behind the dom.w3c_pointer_events.enabled preference (needs to be set to true). To change preferences in Firefox, visit about:config.
Opera Android Full support 42Safari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
User must explicitly enable this feature.
User must explicitly enable this feature.

See also

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このページの貢献者: mfluehr, chrisdavidmills
最終更新者: mfluehr,