Use html-imports and webcomponents in your webpack bundle with Vulcanize (from Polymer)
With ES6 support via babel.
- Specify root path with base
 - Minify javascript with 
NODE_ENV=productionor query parameter compress. - The module will vulcanize the file and write write the document.head to add the corresponding html-import.
 
require("vulcanize?compress=true&base=/lib!./imports.html");
// => returns i. e. "/lib/imports.html"- To watch files for changes, use a 
|separated list of relative filenames - To watch folders for changes, use a 
|separated list of relative directories 
require("vulcanize?compress=true&base=/lib&watchFolders=./elements|./elements2&watchFiles=./elements3/a.html|./elements3/b.html!./imports.html");
// => returns i. e. "/lib/imports.html"
//    rebuilds when any file in ./elements or ./elements2 changes
//    rebuilds when ./elements3/a.html or ./elements3/b.html changes