tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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Node-isConnected.html (2926B)

      1 <!DOCTYPE html>
      2 <meta charset="utf-8">
      3 <head>
      4 <title>Node.prototype.isConnected</title>
      5 <link rel=help href="https://dom.spec.whatwg.org/#dom-node-isconnected">
      6 <script src="/resources/testharness.js"></script>
      7 <script src="/resources/testharnessreport.js"></script>
      8 </head>
      9 <body>
     10 <script>
     11 
     12 "use strict";
     13 
     14 test(function() {
     15  var nodes = [document.createElement("div"),
     16               document.createElement("div"),
     17               document.createElement("div")];
     18  checkNodes([], nodes);
     19 
     20  // Append nodes[0].
     21  document.body.appendChild(nodes[0]);
     22  checkNodes([nodes[0]],
     23             [nodes[1], nodes[2]]);
     24 
     25  // Append nodes[1] and nodes[2] together.
     26  nodes[1].appendChild(nodes[2]);
     27  checkNodes([nodes[0]],
     28             [nodes[1], nodes[2]]);
     29 
     30  nodes[0].appendChild(nodes[1]);
     31  checkNodes(nodes, []);
     32 
     33  // Remove nodes[2].
     34  nodes[2].remove();
     35  checkNodes([nodes[0], nodes[1]],
     36             [nodes[2]]);
     37 
     38  // Remove nodes[0] and nodes[1] together.
     39  nodes[0].remove();
     40  checkNodes([], nodes);
     41 }, "Test with ordinary child nodes");
     42 
     43 test(function() {
     44  var nodes = [document.createElement("iframe"),
     45               document.createElement("iframe"),
     46               document.createElement("iframe"),
     47               document.createElement("iframe"),
     48               document.createElement("div")];
     49  var frames = [nodes[0],
     50                nodes[1],
     51                nodes[2],
     52                nodes[3]];
     53  checkNodes([], nodes);
     54 
     55  // Since we cannot append anything to the contentWindow of an iframe before it
     56  // is appended to the main DOM tree, we append the iframes one after another.
     57  document.body.appendChild(nodes[0]);
     58  checkNodes([nodes[0]],
     59             [nodes[1], nodes[2], nodes[3], nodes[4]]);
     60 
     61  frames[0].contentDocument.body.appendChild(nodes[1]);
     62  checkNodes([nodes[0], nodes[1]],
     63             [nodes[2], nodes[3], nodes[4]]);
     64 
     65  frames[1].contentDocument.body.appendChild(nodes[2]);
     66  checkNodes([nodes[0], nodes[1], nodes[2]],
     67             [nodes[3], nodes[4]]);
     68 
     69  frames[2].contentDocument.body.appendChild(nodes[3]);
     70  checkNodes([nodes[0], nodes[1], nodes[2], nodes[3]],
     71             [nodes[4]]);
     72 
     73  frames[3].contentDocument.body.appendChild(nodes[4]);
     74  checkNodes(nodes, []);
     75 
     76  frames[3].remove();
     77  // Since node[4] is still under the doument of frame[3], it's still connected.
     78  checkNodes([nodes[0], nodes[1], nodes[2], nodes[4]],
     79             [nodes[3]]);
     80 
     81  frames[0].remove();
     82  // Since node[1] and node[2] are still under the doument of frame[0], they are
     83  // still connected.
     84  checkNodes([nodes[1], nodes[2], nodes[4]],
     85             [nodes[0], nodes[3]]);
     86 }, "Test with iframes");
     87 
     88 // This helper function is used to check whether nodes should be connected.
     89 function checkNodes(aConnectedNodes, aDisconnectedNodes) {
     90  aConnectedNodes.forEach(node => assert_true(node.isConnected));
     91  aDisconnectedNodes.forEach(node => assert_false(node.isConnected));
     92 }
     93 
     94 </script>
     95 </body>