Tools: JavaScript module support

[justinfagnani]

We currently don't bundle JavaScript, only inline it. We'll need to support bundling script for modules.

• [x] Add support for modules to Analyzer.
  
  
  
  • Full module support is tracked here: https://github.com/Polymer/polymer-analyzer/issues/731
  
  
  • Import support was added in https://github.com/Polymer/polymer-analyzer/pull/732 and https://github.com/Polymer/polymer-analyzer/pull/733
  
  
  • Dynamic import support is tracked here: https://github.com/Polymer/polymer-analyzer/issues/740
  
  
• [x] Track JavaScript files in the bundle manifest
• [x] Generate lists of JS files to bundle.
• [x] Generate bundles - whether we write new code to do this or delegate to Rollup is TBD. We're going to experiment with Rollup first.
• [x] Rewrite references to bundled files.

[rjsteinert]

I believe a lot of the Angular community was using Rollup, but standardized on Webpack as implemented in the Angular CLI.

Examples of bundling polymer 3 with webpack:

• https://github.com/chybie/poly-mini-game
• https://github.com/pferretti/polymer3-typescript

[craftyc0der]

Is there any documentation available for bundling a Polymer 3 app for Firefox/Edge?

[rjsteinert]

@craftyc0der I work on a project that currently uses Webpack bundle Polymer 3. Not much for documentation but it's an example. Unfortunately it's also not the cleanest example as we are Webpack n00bs.

[justinfagnani]

FYI, we're using Rollup in the Bundler. The PRs are being reviewed now. We'll have documentation soon.

[usergenic]

This is in master now.