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<!DOCTYPE html>
<html>
<body>
​
<p>Click this button to invoke an onclick event, and check whether it is trusted:</p>
<button id="myBtn" onclick="myFunction(event)">Try it</button>
​
<p>Click this button to trigger an onclick event by a script, and check whether it is trusted:</p>
<button onclick="triggerClick()">Try it</button>
​
<p><strong>Note:</strong> The isTrusted property is not supported in Safari and IE8 and earlier.</p>
​
<script>
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");
  }
}
​
function triggerClick() {
  var btn = document.getElementById("myBtn");
  btn.click();
} 
</script>
​
</body>
​
</html>
​
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