A simple code snippet to apply syntax highlight with current page

highlight.js

(d => {
  let e = d.createElement('link');
  e.rel = 'stylesheet';
  e.href = 'https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/styles/github.min.css';
  d.body.appendChild(e);
  
  e = d.createElement('script');
  e.src = 'https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.1/highlight.min.js';
  e.onload = () => {
    e = document.createElement('script');
    e.src = 'https://cdnjs.cloudflare.com/ajax/libs/highlight.js/9.13.0/languages/javascript.min.js';
    e.onload = () => {
      d.querySelectorAll('pre').forEach(hljs.highlightBlock);
    }
    d.body.appendChild(e);  
  };
  d.body.appendChild(e);  
})(document);

Bookmarklet version is here: https://gist.github.com/ryo-utsunomiya/5ef047e4fef5bcaf9cd8538471c26085