Improve minification

The minification of template strings with terser currently is suboptimal, the problem being strings with repeated spaces and line breaks ending up in the minified code (excerpt):

`\n<style>\n*,\n::before,\n::after {\n  box-sizing: border-box;\n}\n\n:host {\n  […]`

This is most probably me holding terser wrong. Essentially I’m looking for something like babel-plugin-minify-template-strings, but for terser. Help wanted.

CC: @RReverser @mathiasbynens

[tomayac]

You don’t just want minify-template-strings (i.e. just removing whitespace), you want minify-css-in-template-strings. I don’t know of an existing tool that does this.

Eagerly awaiting CSS modules that will make this so much better.

[tomayac]

Is [:host([hidden]) {…}] necessary?

Yes, it’s a best practice.