Do something after styles have been updated about style-loader HOT 3 CLOSED

'use strict';

var viewportUnitsBuggyfill = require('viewport-units-buggyfill'),
    { any } = require('underscore');

viewportUnitsBuggyfill.init();
var patchedViewportStyleNode = document.getElementById('patched-viewport');

function isAppStyleNode(node) {
  return node.tagName === 'STYLE' && node !== patchedViewportStyleNode;
}

function refreshViewportBuggyfill() {
  viewportUnitsBuggyfill.refresh();
  patchedViewportStyleNode.parentNode.appendChild(patchedViewportStyleNode);
}

function handleHeadMutation(mutationRecords) {
  if (any(mutationRecords, record => any(record.addedNodes, isAppStyleNode))) {
    refreshViewportBuggyfill();
  }
}

if (patchedViewportStyleNode) {
  if (typeof MutationObserver !== 'undefined') {
    new MutationObserver(handleHeadMutation).observe(document.head, {
      childList: true
    });
  } else {
    setInterval(refreshViewportBuggyfill, 1500);
  }
}