Automated insert <link rel=preload> in html head on production

[realdennis]

After building app, it will create lots of .js & .proxy.css, some in /_dist_/js or maybe in /web_modules/ , though we can manually set the meta in header, but it will be convenient for developer if automated add it after building.

[jbuckner]

You can use the snowpack-optimize plugin with the preloadModules option:

plugins: [
  ["@snowpack/plugin-optimize", { preloadModules: true }]
],