如何：

var oFra = document.createDocumentFragment();
var myDiv = document.createElement("div");
myDiv.id="myId";
oFra.appendChild(myDiv);
oFra.getElementById("myId"); //not in FF

除非您添加了创建的 div 到你的文档片段我不知道为什么 getElementById 会找到它？

Unless you've added the the created div to your document fragment I'm not sure why getElementById would find it?

-edit

如果你愿意滚动自己的getElementById函数，那么你应该能够获得你以后的引用，因为这段代码的工作原理是： p>

If you're willing to roll your own getElementById function then you ought to be able to get the reference you're after, because this code works:

var oFra = document.createDocumentFragment();
var myDiv = document.createElement("div");
myDiv.id = "myId";
oFra.appendChild(myDiv);
if (oFra.hasChildNodes()) {
    var i=0;
    var myEl;
    var children = oFra.childNodes;
    for (var i = 0; i < children.length; i++) {
        if (children[i].id == "myId") {
            myEl = children[i];
        }
    }
}
window.alert(myEl.id);