child-nodes-length-cache.html - Android社区 - https://www.androidos.net.cn/

<html>
<head>
<script>
if (window.layoutTestController)
    layoutTestController.dumpAsText();

function onLoad()
{
    var theDiv = document.getElementById("theDiv");
    var theAttrs = theDiv.attributes;

    var nameAttr = theAttrs.getNamedItem("name");
    var nameAttrChildNodes = nameAttr.childNodes;
    var textNode = document.createTextNode("terday");
    var unused = nameAttrChildNodes.length;
    nameAttr.appendChild(textNode);

    var name2Attr = theAttrs.getNamedItem("name2");
    var name2AttrChildNodes = name2Attr.childNodes;
    var textNode2 = document.createTextNode("terday");
    name2Attr.appendChild(textNode2);
        
    if (nameAttrChildNodes.length != name2AttrChildNodes.length)
        document.getElementById("result").innerHTML = "Failed: nameAttrChildNodes.length=" + nameAttrChildNodes.length + ", name2AttrChildNodes.length=" + name2AttrChildNodes.length;
    else
        document.getElementById("result").innerHTML = "Passed!!";

    document.body.removeChild(document.getElementById("theDiv"));
}
</script>
</head>
<body onload="onLoad();">
<p>Test for <a href="https://bugs.webkit.org/show_bug.cgi?id=19759">bug 19759</a>:
ChildNodeList for an attribute node is not properly invalidated after appending a child.</p>
<div id="theDiv" name="Yes" name2="Yes">Hello</div>
<div id="result">Testing...</div>
</body>
</html>