Learn how you can fix JavaScript require is not defined error

Sometimes, JavaScript may suddenly give you a require is not defined error like this:

Uncaught ReferenceError: require is not defined

This usually happens because your JavaScript environment doesn’t understand how to handle the require() function reference. The require() function is only available by default on Node.js environment.

If you need to use it on the browser, you need to add the require() function to the browser by using the RequireJS library.

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