Link external links to a new window.

target-blank.js

/*-------------------------
Target Blank
---
Link all external links to a new window.
-------------------------*/

document.addEventListener('DOMContentLoaded', () => {
  for (var c = document.getElementsByTagName('a'), a = 0; a < c.length; a++) {
    var b = c[a];
    b.getAttribute('href') &&
      b.hostname !== location.hostname &&
      (b.target = '_blank');
  }
});