third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-request-fallback-iframe.html

   1 <script>
   2 function xhr(url) {
   3   return new Promise(function(resolve, reject) {
   4       var request = new XMLHttpRequest();
   5       request.addEventListener(
   6         'error',
   7         function(event) { reject(event); });
   8       request.addEventListener(
   9         'load',
  10         function(event) { resolve(request.response); });
  11       request.open('GET', url);
  12       request.send();
  13     });
  14 }
  15
  16 function load_image(url, cross_origin) {
  17   return new Promise(function(resolve, reject) {
  18       var img = document.createElement('img');
  19       document.body.appendChild(img);
  20       img.onload = function() {
  21         resolve();
  22       };
  23       img.onerror = function() {
  24         reject();
  25       };
  26       if (cross_origin != '') {
  27         img.crossOrigin = cross_origin;
  28       }
  29       img.src = url;
  30     });
  31 }
  32 </script>