Hello, and welcome to our course all about JavaScript error handling. I am so very excited to be joining you in this course and guiding you through one of the most important topics in front-end development, even though it's often overlooked. So let's first answer the question, why does error handling matter? Well, imagine that you're building a house.
You certainly wouldn't want to only focus on how it looks. you would also want to prepare for the unexpected. Things like damaging storms, so you buy insurance. Things like avoiding building in a floodplain so that you can protect your assets.
Well, building an application in JavaScript is very similar. It's about making your apps resilient even when things go wrong. And trust me, they absolutely will go wrong. Network requests will fail.
Users will input unexpected data. APIs will return unusual and totally unexpected responses. External services will experience downtime. Without proper error handling, these kinds of issues could bring your application crashing down, frustrating users and ultimately costing your business money.
But with the right error handling in place, you can gracefully recover from such issues. How? Well, by providing meaningful feedback to users to help ease their frustration and provide them with avenues to recover, as well as logging issues for debugging so that your development team can ensure that the same issue never happens again. So throughout this course, we'll begin with the fundamentals and then progress to more advanced error handling patterns.
Here's a bit of a preview of what you can expect. Chapter one, we'll focus on core concepts and syntax. We'll start with the very basic building blocks, things like try catch, different types of errors, and how to create a custom error class. You'll also learn how to handle errors in both synchronous and asynchronous code with special attention paid to working with the fetch API.
Then in chapter two, We'll move on to some professional best practices. You'll learn when to show errors to users and how to show them, how to implement proper error logging, and how to avoid common pitfalls that even some experienced developers make. Before we dive into the technical details, though, let's get our local development environment set up. First of all, you'll need a modern web browser.
You'll also need a code editor. We recommend Visual Studio Code. and then finally the course boilerplate code. You can download that starter code from our course repository.
It's linked in the description below and can be set up with the instructions provided in the README. This code base will give you a simple playground where you can practice all the concepts that we'll cover as we go along together. Ready to get started error handling like a pro? Let's get to it.