I want to make a jupyter notebook extension and I am following this repo . I needed to run python code using javascript for which I am trying to use the npm python-shell

To import the package, I tried using require module but its not working because it is not supposed to be run on browser and requires nodejs. I tried searching for other ways to run nodejs on browser and found stuff like browserify etc. However , the file main.js in the repo linked above is using the require module comfortably. How is it doing so? What am I missing? Below is the code and the error I get in the browser. I have installed require and python-shell module using npm already.

Code:

define(['require','PythonShell','base/js/namespace', 'base/js/events'], function (require,Jupyter, events) {
  

  var PythonShell = require('python-shell');
  PythonShell.runString('x=1;print(x)',null,function(err,results) {
    console.log(results);
  });

  function load_ipython_extension() {
    console.log("Hello World");
  }
  return {
    load_ipython_extension: load_ipython_extension,
  };
});

Error: