How To Fix Require Is Not Defined Error in Javascript?

The browser does not come pre-installed with the ability to call require(). Node js defines the require function, which has nothing to do with browsers. Server-side NodeJS code typically makes use of the require() method.

Uncaught Referenceerror: Require Is Not Defined – Require Is Not Defined Javascript

require() is not a function that is natively supported by any browsers. Many times, JavaScript will suddenly give you a require is not defined error, which will look something like this:

“Uncaught Referenceerror: Require Is Not Defined”

Because your JavaScript environment doesn’t know how to deal with the require() function reference, this usually happens. Node.js is the only environment where the require() method is provided by default.

If you want to use it in a browser like this (Google Chrome, Mozilla Firefox, Safari Web Browser, and many others), you’ll need to utilize the RequireJS library to add the require() function to the browser.

In Node JS, the require() method may be well-known to you, and you may have seen errors like Uncaught ReferenceError: require is not defined when using it.

What’s the reason for this? And how to fix uncaught referenceerror require is not defined? Check it out in today’s article.

Let us first examine the purpose of require() before moving on to the error.

What exactly is require?

The require function is a built-in function of Node.js. It enables us to incorporate local or node module code into our project even if it is located in a different file.

Now that we have your attention, let’s investigate the cause of the error. This is just an example of how the code should look.

When you try to run this code in the browser after serving it with Node.js’s HTTP server, you will receive the error “Uncaught ReferenceError: require is not defined.” This message will be displayed in the console, where it will demonstrate that the server is functioning.

Why did this happen?

Node js defines the require function, and it has nothing to do with the browser at all. Both Node JS and Chrome use Javascript’s V8 engine, however, the two are very different in terms of how they run js. Only client-side javascript can be executed by your browser. The node must be installed on your computer to run this code without issue. Installing node js on a Mac, Windows, or Linux computer is easy with this step-by-step tutorial.

To see if it was installed correctly, open a terminal and type node -v.

To run this code without problem, save this file as app.js and run it using the command node app.js in your terminal The terminal server will display the results of the code. This indicates that your code is working smoothly.

That’s all there is to it, as far as I know. Try to figure out the problem on your own if you encounter any form of mistake. Because someone else may have encountered a similar issue, you’ll learn how to troubleshoot on your own with this information.
If you’re still having trouble, refer to ITtutoria. They have composed comprehensive articles on errors like this.