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Event.isTrusted

The isTrusted read-only property of the Event interface is a boolean that is true when the event was generated by a user action, and false when the event was created or modified by a script or dispatched via dispatchEvent.

Syntax

var bool = event.isTrusted;

Example

 if (e.isTrusted) {
     /* The event is trusted. */
 } else {
     /* The event is not trusted. */
 }

Specification

Specification	Status	Comment
DOM The definition of 'Event.isTrusted' in that specification.	Living Standard
Document Object Model (DOM) Level 3 Events Specification The definition of 'Trusted events' in that specification.	Obsolete	Adds requirements regarding trusted and untrusted events, though it does not itself define the `isTrusted` property.

Browser compatibilityUpdate compatibility data on GitHub

	Desktop
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	46 46 Starting with Chrome 53 and Opera 40, untrusted events do not invoke the default action.	Yes	Yes	No No In Internet Explorer, all events are trusted except those that are created with the `createEvent()` method.	33 33 Starting with Chrome 53 and Opera 40, untrusted events do not invoke the default action.	No

	Mobile
	Android webview	Chrome for Android	Edge Mobile	Firefox for Android	Opera for Android	iOS Safari	Samsung Internet
Basic support	46 46 Starting with version 53, untrusted events do not invoke the default action.	46 46 Starting with Chrome 53 and Opera 40, untrusted events do not invoke the default action.	Yes	Yes	33 33 Starting with Chrome 53 and Opera 40, untrusted events do not invoke the default action.	No	?

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https://developer.mozilla.org/en-US/docs/Web/API/Event/isTrusted