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JavaScript error messages can be cryptic and frustrating, especially when you’re learning.
In this unit, we’ll cover some of the most common JavaScript errors you’ll encounter, explain what causes them, and show you how to fix them.
These are real-world errors that developers face regularly, from “is not a function” to “document is not defined” and module-related issues.
Understanding these errors will save you hours of debugging time and help you write more robust code.