8: How to specify multiple css media types in a libraries.yml file Entering the list "screen, print" doesn't work:

base:
  version: VERSION
  css:
    theme:
      css/styles.css: { media: screen, print }


The resulting HTML should be:

&lt;link rel="stylesheet" type="text/css" href="css/styles.css" media="screen,print" /&gt;
css/styles.css: { media: "screen,print" }      # outputs media="screen,print" (WORKS!)
css/styles.css: { media: ['screen', 'print'] }  # outputs media="screen print"