font-spice-up-snippet.js

// Hey guys, *would you like to spice up your web whatsapp or slack font*?
// => Open the the browser console `CMD + ALT + I`, select the *Console*  tab and paste the above snippet.
// Have fun.

(function() {
  var link = document.createElement('link');
  link.setAttribute('rel', 'stylesheet');
  link.setAttribute('href', '//fonts.googleapis.com/css?family=Nova+Oval');
  document.head.appendChild(link);

  link.onload = function() {
    document.body.style.fontFamily = '\'Nova Oval\', cursive';
    var style = document.createElement('style');
    style.innerHTML = 'div[class*="message"], div[class*="channel"], div[class*="comment"], span[class*="message"] { font-family: "Nova Oval", cursive; }';
    document.head.appendChild(style);
  }
})();