When an exception occurs, the kind of exception your program encountered (in this case, TypeError) is displayed in the output along with the error message. TypeError is one of many runtime errors that can occur depending on the type of problem the program faces. A runtime error occurs when a program crashes even though the syntax is correct. However, in our case, TypeError is a runtime error. When the compiler recognizes an incorrect statement, syntax errors happen. Aside from logical problems, there are two other types of errors in JavaScript: syntax errors and runtime errors (we commonly call them exceptions). To understand TypeError, we must first comprehend how JavaScript errors function. In this article, we will understand what this annoying error message means and show you how to fix this error for good. If you’re getting the Type Error “forEach is not a function” when trying to use the forEach() method on a variable, you’ve come to the right place. Of course, sometimes no matter how hard you try, you can’t find the error in your code. But as any experienced programmer will tell you, the key to finding the error is to take a step back and look at the big picture. You can spend hours looking at the same lines of code, and still not see the mistake. As anyone who is a beginner at JavaScript or is actively learning JavaScript, there is nothing more frustrating than trying to find the error in your code.
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