The Ultimate Guide to Spotting Harmful JavaScript Before It Destroys Your Code

JavaScript is everywhere — in your websites, apps, and probably your refrigerator (thanks, smart home devices).

However, with all this power comes a negative side: harmful JavaScript code. Yes, the virus is out there, hiding like a digital ninja, ready to access your data, damage your security, or just make your life uncomfortable.

So, what is the purpose of this story? To guide you, dear developer, in finding, understanding, and removing these misleading scripts before they create confusion in your projects or, worse, the lives of your users.

Consider this your all-in-one guide to all things harmful JavaScript. Let’s go in!

Understanding Malicious JavaScript Code

What Exactly Is Malicious JavaScript?

Bad JavaScript is like an unwanted visitor who comes to your party, eats all of your chips, and then “borrows” your credit card to buy a boat.

A virus refers to any script having a malicious purpose, such as cross-site scripting (XSS)…