Simple code snippet for loading external script from a bookmarklet.

load-external-script-snippet.js

/**
 * load-external-script-snippet.js
 * Kosei Moriyama <cou929@gmail.com>
 *
 * Simple code snippet for loading external script from a bookmarklet.
 * Replace example url of script to your target script url before use.
 */

(function() {
  var u = 'http://example.com/bookmarklet.js';
  var s = document.createElement('script');
  s.type = 'text/javascript';
  s.charset = 'utf-8';
  s.src = u;
  document.body.appendChild(s);
})()

// compressed version
javascript:(function(d,u,s){s=d.createElement('script');s.type='text/javascript';s.charset='utf-8';s.src=u;d.body.appendChild(s)})(document,'https://kollavarsham.org/smc-webfonts/scripts/bookmarklet.es5.min.js')