Explain JavaScript Error Object.

JavascriptWeb DevelopmentObject Oriented Programming

The error object is basically thrown by the JavaScript interpreter when a script error occurs. This error object can also be thrown as exception for user defined exceptions. The two javaScript error object properties are −

PropertyDescription
nameIt sets or returns the name of the error.
messageIt sets or returns the error message as string

Following is the code for error object in JavaScript −

Example

 Live Demo

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
   body {
      font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
   }
   .result {
      font-size: 20px;
      font-weight: 500;
   }
</style>
</head>
<body>
<h1>JavaScript Error Object</h1>
<div style="color: green;" class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above button display the error object
</h3>
<script>
   let resEle = document.querySelector(".result");
   document.querySelector(".Btn").addEventListener("click", () => {
      try {
         a;
      }
      catch (err) {
         resEle.innerHTML = "Error = " + err + "<br>";
         resEle.innerHTML += "error.name = " + err.name + "<br>";
         resEle.innerHTML += "error.message = " + err.message + "<br>";
      }
   });
</script>
</body>
</html>

Output

The above code will produce the following output −

On clicking the ‘CLICK HERE’ button −

raja
Published on 16-Jul-2020 07:53:50
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