Browser-friendly ES modules

[sliekens]

Feature Request

RxJs is very useful in browser apps but unless you're using a bundler it's kind of hard to use the esm2015 version in the browser.

The reason why it's difficult is that all the import/export statements are extensionless:

// rxjs/_esm2015/index.js
export { Observable } from './internal/Observable';

In the browser that translates to an extensionless GET, which fails on naive HTTP servers.

GET /rxjs/_esm2015/internal/Observable
Referer: /rxjs/_esm2015/index.js

404 Not Found

Extensionless imports could work on a less naive server that knows how to resolve modules. I don't know of any HTTP server that does this and honestly I don't expect there to be one because that's terribly inefficient.

GET /rxjs/_esm2015/internal/Observable
Referer: /rxjs/_esm2015/index.js

302 Found
Location: /rxjs/_esm2015/internal/Observable.js

GET /rxjs/_esm2015/internal/Observable.js
Referer: rxjs/_esm2015/index.js

200 OK

So my feature request is to add js extensions to the imports and exports in the ESM build output.

[kwonoj]

Closing as dupe of #2858 . We are aware but need to decide which way to correctly produce desired build. No exact eta unfortunately at this moment.

[sliekens]

Thanks for the link.