Managing Errors

In this lesson, we’ll learn about how to manage errors in JavaScript to ensure that our code runs smoothly and handles unexpected issues gracefully.

Understanding error management in JavaScript

JavaScript provides robust tools to detect, handle, and recover from errors. Proper error management makes our applications more reliable and user-friendly by preventing crashes and unexpected behavior.

Types of JavaScript errors

Following are the common types of errors that programmers face during development:

• Syntax errors: These occur when the code violates JavaScript’s syntax rules. For example: if (true { console.log('Missing closing parenthesis');

• Runtime errors: These occur during execution, often due to invalid operations. For example: console.log(nonExistentVariable);

• Logical errors: These occur when the code executes but produces incorrect results. For example: Using = instead of ==.

Using try...catch for error handling

The try...catch block is the primary tool for managing runtime errors in JavaScript. Its basic syntax is as follows: