A handy script to aid in UI development; reloads only CSS without reloading the entire page.

css-reloader.js

window.css_refresh_index = 0;
const begin = () => {
  var nodes = document.querySelectorAll('link');
  [].forEach.call(nodes, function (node) {
      node.href += '?___ref=0';
  });
}

const refresh = () => {
  if (!window.css_refresh_index) {
    window.css_refresh_index = 0;
  }
  window.css_refresh_index++;
  let i = window.css_refresh_index;

  var nodes = document.querySelectorAll('link');
  [].forEach.call(nodes, function (node) {
      node.href = node.href.replace(/\?\_\_\_ref=[0-9]+/, '?___ref=' + i);
  });
  console.log(`refreshed css ${i} time(s)`);
}

begin();