redux-devtools/extension/test/app/setup.js

require('@babel/register')();
require('@babel/polyfill');
global.chrome = require('sinon-chrome');
var jsdom = require('jsdom').jsdom;

var exposedProperties = ['window', 'navigator', 'document'];

global.document = jsdom('');
global.window = document.defaultView;
Object.keys(document.defaultView).forEach((property) => {
  if (typeof global[property] === 'undefined') {
    exposedProperties.push(property);
    global[property] = document.defaultView[property];
  }
});

global.navigator = {
  userAgent: 'gecko',
};

global.document.createRange = function () {
  return {
    setEnd: function () {},
    setStart: function () {},
    getBoundingClientRect: function () {
      return { right: 0 };
    },
  };
};

documentRef = document;