isTrusted Event Property

DOM Events Event Object

Definition and Usage

The isTrusted event property returns a boolean value indicating whether the event is trustworthy.

Note:In Chrome, Firefox, and Opera, an event is considered trustworthy if it is triggered by the user, and it is considered untrustworthy if it is triggered by a script. In IE, all events are trustworthy except for those created using the createEvent() method.

Example

Determine if a specific event is trustworthy:

function myFunction(event) {
  if ("isTrusted" in event) {
    if (event.isTrusted) {
      alert("The " + event.type + " event is trusted.");
    } else {
      alert("The " + event.type + " event is not trusted.");
    }
  } else {
    alert("The isTrusted property is not supported by your browser");
  }
}

Try it yourself

Syntax

event.isTrusted

Technical Details

Return Value:

Boolean value indicating whether the event is trusted.

Possible Values:

  • true - Event is Trusted
  • false - Event is Untrusted
DOM Version: DOM Level 3 Events

Browser Support

The numbers in the table indicate the first browser version that fully supports the property.

Properties Chrome IE Firefox Safari Opera
isTrusted 46.0 9.0 Supported Not Supported 33.0
DOM Events Event Object