Uncaught ReferenceError: x is not defined | JavaScript Errors
The correct the Uncaught ReferenceError: x is not defined in JavaScript, you first have to know what the error is telling you. The error is telling you that the value you are trying at that point in time does not yet exist. In this case of functions, you see this when you try to access a variable outside of the scope of a function, that was only defined inside of the function. To fix this error, you simply avoid doing that. The other case is simple top level variables. If you use a value before it is defined, you have to either define it first, or you a different value.
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