JavaScript - Error Handling

Error handling refers to the process of detecting and responding to errors and exceptions that occur while executing JavaScript code. JavaScript provides error-handling mechanism to catch runtime errors using try-catch-finally block.

try {

   // your code

} catch (error) {

   // error handling code


The throw statement is used to throw an error explicitly. It is often used inside the try block to throw an error when a specific condition is not met. For example:

if (x === 0) {

   throw new Error("x cannot be 0");


The window.onerror event is the other way to handle errors in JavaScript. Example:

window.onerror = function(message, source, line, column, error) {

   // error handling code