Consider building ESM for browser.

TL;DR: For ES modules to work in a browser, import statements need the .js extension on them. https://github.com/Zoltu/typescript-transformer-append-js-extension/ is a a TypeScript transformer that will do that for you automatically during build.

For a detailed description of the problem see the Motivation section of https://github.com/Zoltu/typescript-transformer-append-js-extension/. For a solution, see the Usage section of the same repository.

[yysun]

Totally agreed, we should support future technologies.

In the apprun@latest release, the apprun.js is the UMD and ES5 build.

In the apprun@es6 release, the apprun.js is the UMD and ES2015 build. The apprun.esm.js is the ESM and ES2015 build, which is defined as pkg.module.

I hope someday I can make apprun@es6 as the default and latest.

[yysun]

If you really want unbundled modules, try this

<script type="module">
  import { app, Component } from 'https://unpkg.com/apprun@es6/esm/apprun?module';
</script>

unpkg.com can serve the modules dynamically by using the ?module parameter.