A step-by-step guide to importing the RxJs module directly into the browser after compiling Typescript, without the use of Angular, Webpack, or

My RxJs code is currently running on Node, compiling to Script.js after TS compilation with the following lines:

Object.defineProperty(exports, "__esModule", { value: true });
var rxjs_1 = require("rxjs");
var operators_1 = require("rxjs/operators");
...

Now, I want to run this code in a Browser. The first step is to address module support on the Browser, which can be achieved with this initial script:

<script>var exports = {};</script>

I'm not sure about the theoretical correctness, but it seems to be working. The next step for me is to install and configure Require.JS, like so:

<script src="http://requirejs.org/docs/release/2.3.6/comments/require.js"></script>
<script type="text/javascript">
    require.config({
      paths: {
          "rxjs": "https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min.js",
          "jquery": "https://ajax.googleapis.com/ajax/libs/jquery/1.8.1/jquery.min"
      }
    });
  </script>
  <script type="text/javascript">
    require( ["jquery"],
      function ($) {
        console.log($("#myButton").val())
      }
    );
  </script>

I don't currently need jQuery, I'm just testing how Require.JS functions with it. It seems to be working fine. However, the next challenge is linking RxJS and RxJs/Operator correctly - any suggestions on achieving this? I tried replacing () with [] in my Script.JS as required by RequireJS, starting from:

Object.defineProperty(exports, "__esModule", { value: true });
var rxjs_1 = require["rxjs"];
var operators_1 = require["rxjs/operators"];
...

But the Browser throws an error stating "Uncaught TypeError: rxjs_1 is undefined", indicating that RxJS is not loaded and its functions are not defined. How do I resolve this issue (without just defining the root namespace of RxJS, but also RxJS/Operators)?

Answer №1

It's not necessary to separate them into rxjs/operators and rxjs, as they are all included in the single object rxjs. Here is a working example for reference:

requirejs.config({
    appDir: '.',
    baseUrl: 'js',
    paths: {
      rxjs: ['https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min'],
    },
  });

  require(['rxjs'], function (rxjs) {
    console.log('Loaded :)');
    // simple
    rxjs.of(true).subscribe(console.log);
    // complex!
    rxjs
      .of(true)
      .pipe(
        rxjs.switchMap(() => rxjs.of('qwerty'))
      )
      .subscribe(console.log);
  });
<script src="https://cdnjs.cloudflare.com/ajax/libs/require.js/2.1.9/require.min.js"></script>

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