Javascript – Uncaught ReferenceError: process is not defined


I am using node.js to create a web application. When I run the application (either by opening index.html on the browser or using the command "npm start" on the terminal) I get two errors:

Uncaught ReferenceError: process is not defined

Uncaught ReferenceError: require is not defined

I solved the "require is not defined" error by specifically including in my index.html head tag the link to this script, where the require function is defined.
However, I cannot find something similar for the process function.

My question is doublefold:

  1. Why do built-in node.js modules need to be re-defined? Why are they not recognized as they are, that is "built-in modules"? Doesn't the term "built-in module" mean that a module need not be redefined externaly/second-handedly?

  2. Is there a way to solve this problem? My script is very simple, I am just trying to use a basic function of node.js, so I cannot figure out what errors I might have done.

If anyone has come about this problem and has found a way around it or a reason this happens, you would be of great help.

Best Solution

Node.js code must be run by the node process, not the browser (the code must run in the server).

To run the code, you must run the command:

node server.js

And then you can access your server from a browser by typing "http://localhost:8080", for example. You must have a file server.js (or whatever) with the server code you want (in this case, creating a web server in port 8080).

You can follow this easy example, using express as http server module: