Don’t Let Errors Ruin Your App — Master Error Handling in JavaScript

Step-by-step guide to catching and dealing with errors using conditional statements

Photo by Brett Jordan on Unsplash

As a JavaScript developer, you know that errors are inevitable. Whether it’s user input gone wrong, network issues, or plain old bugs, your application will encounter errors at some point. The key to creating a robust and user-friendly app is how you handle those errors.

In this article, we’ll explore how to use conditional statements in JavaScript to catch and handle errors effectively. We’ll cover try…catch blocks, throwing custom errors, and best practices for error handling. By the end, you’ll have the knowledge and code examples to take your error handling game to the next level.

The try…catch Statement

The try…catch statement is the foundation of error handling in JavaScript. It allows you to wrap code that might throw an error in a try block, and catch that error in a catch block. Here’s the basic syntax:

try {
  // Code that might throw an error
} catch (error) {
  // Code to handle the error
}

Let’s look at an example where we try to access an object property that doesn’t exist:

const user = {
  name: 'Alice',
  age…