https://www.jhrl.com/sites/all/modules/bluetent/riot_tags/js/polyfill.js?tlse4v

1if (typeof Object.assign != 'function') {
2  Object.assign = function(target) {
3    'use strict';
4    if (target == null) {
5      throw new TypeError('Cannot convert undefined or null to object');
6    }
7
8    target = Object(target);
9    for (var index = 1; index < arguments.length; index++) {
10      var source = arguments[index];
11      if (source != null) {
12        for (var key in source) {
13          if (Object.prototype.hasOwnProperty.call(source, key)) {
14            target[key] = source[key];
15          }
16        }
17      }
18    }
19    return target;
20  };
21}