How can I detect if the browser supports the gesturestart event?

Question

How can I detect if the browser supports the gesturestart and other gesture events? These events are used for pinch to rotate and zoom.

They seem to be only available on iOS.

I wish to emulate them if they are not available natively.

Answer 1

Try this method, catches more devices/browsers :-

try {
  document.createEvent("gesturestart");
  alert(true);
}
catch (e) {
  alert(false);
}

Answer 2

我认为您可以简单地检查事件是否存在，如下所示：

document.documentElement.ontouchstart !== 'undefined'

Answer 3

You can check for ongesturestart in window as:

if ('ongesturestart' in window){

  // do something 
}

Answer 4

Other methods mentioned here will fail on MacOS Safari.

In MacOS Safari, 'ongesturestart' in window returns false , even though gesture events like gesturestart are supported.

You can check for gesture support by checking for GestureEvent :

'GestureEvent' in window