Hello, eager learner! Today, we will examine error messages in JavaScript. When our code behaves unexpectedly, a red flag, in the form of an error message, informs us. In this lesson, we will learn how to use these guiding components to make course corrections in our code.

We all make mistakes, and it is crucial to learn from them. Consider the first time you played baseball and missed your throw. Your throw was guided by error messages. Each time you missed, you adjusted your aim, bringing you closer to your target. Error messages in programming function quite similarly to this analogy. They guide us in finding and correcting issues in our code.

Error messages in JavaScript typically consist of three parts: line number (e.g., solution.js:2 means the error is in the 2nd line), the error name (like ReferenceError, SyntaxError, etc.), and a descriptive error message.

Consider this snippet:

This code throws a ReferenceError on line 1 with the message "name is not defined". Here, we attempt to refer to the name variable. However, as it has not been defined yet, JavaScript throws an error.

Another common error we often encounter is the , which occurs when JavaScript encounters syntax that it doesn't understand.