HTML isTrusted Event Property

HTML Web Development Front End Technology

The HTML isTrusted event property returns a boolean value corresponding to whether the event is trusted or not.

NOTE − If invoked by a script the isTrusted returns false and if invoked by user then isTrusted returns true.

Let us see an example of isTrusted event property −

Example

<!DOCTYPE html>
<html>
<head>
<title>HTML isTrusted</title>
<style>
   form {
      width:70%;
      margin: 0 auto;
      text-align: center;
   }
   * {
      padding: 2px;
      margin:5px;
   }
   input[type="button"] {
      border-radius: 10px;
   }
</style>
</head>
<body>
<form>
<fieldset>
<legend>HTML-isTrusted-attribute</legend>
<input type="email" id="emailSelect" placeholder="eg: xyz@abc.com">
<input type="password" id="passWordSelect">
<input id="loginbtn" type="button" value="Login" onclick="login(event)">
<div id="divDisplay">Attempt to login will take place in 2 seconds</div>
</fieldset>
</form>
<script>
   var emailSelect = document.getElementById("emailSelect");
   var passWordSelect = document.getElementById("passWordSelect");
   var loginbtn = document.getElementById("loginbtn");
   var divDisplay = document.getElementById("divDisplay");
   setTimeout(function() {
      emailSelect.value="paulaStanford@MNC.com";
      passWordSelect.value="hellopaula";
      loginbtn.click();
   }, 2000);
   function login(event) {
      if(event.isTrusted)
         divDisplay.textContent = 'Welcome '+emailSelect.value.split("@")[0];
      else
         divDisplay.textContent = 'Unauthorized attempt to login from a script';
   }
</script>
</body>
</html>