XXX Is Not Defined Issue After Putting The Script Into Public/index.html – React

The "XXX is not defined" issue in React typically occurs when you try to use a variable or function that has not been properly defined or imported.

To resolve this issue, follow these steps:

  1. Make sure that the variable or function you are trying to use (in this case, "XXX") is defined before using it. Check if you have missed any declaration or initialization of the variable.

  2. Check if you have imported the necessary module or file where the variable or function is defined. In React, you import components, functions, or variables from other files using the import statement. Ensure that you have imported the required file correctly.

  3. If you are using a third-party library or package, make sure that it has been installed properly and is imported correctly. Double-check the documentation of the library to ensure you are using it correctly.

  4. If you are using an external script in your React application, ensure that you have included it correctly in the public/index.html file. You can include external scripts in the <head> or at the end of the <body> section.

Once you have implemented these steps, save your changes and restart your development server if it is running. This should fix the "XXX is not defined" issue in your React application.

About the Author Rex

I'm a passionate tech blogger with an insatiable love for programming! From my early days tinkering with code, I've delved into web dev, mobile apps, and AI. Sharing insights and tutorials with the world is my joy, connecting me to a global community of like-minded tech enthusiasts. Python holds a special place in my heart, but I embrace all challenges. Constantly learning, I attend tech conferences, contribute to open-source projects, and engage in code review sessions. My ultimate goal is to inspire the next generation of developers and contribute positively to the ever-evolving tech landscape. Let's code together!