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Exception Handling In Javascript

Software Requirements

  1. Windows any version is installed on your machine.
  2. Notepad or any text editor for writing code.

Prerequisite Knowledge

  1. Basic knowledge of JavaScript.
  2. Basic knowledge of HTML.
  3. Knowledge of any programming language is an added advantage.

What Are Exceptions?

Benefits Of Handling Exceptions

Try Catch In Javascript

try {
    //  Write your code here
} catch (e) {
    //  Write error handling code here

try {
    document.getElementById('aa').value = 'test value';
} catch (e) {

Picture showing the alert box showing the exception caught in JavaScript

Throw In Javascript

throw '<Exception_Message>';

Picture showing the cycle of throw keyword in exception handling in JavaScript

try {
    alert('Before Throw');
    throw 'Error';
    alert('After Throw');
} catch (e) {

Posted By  -  Karan Gupta
Posted On  -  Thursday, July 19, 2012


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