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我们每 5 秒进行一次 ajax 调用，目的是将其内容附加到现有的父元素。该父元素最多有 25 个元素，因此任何超过该元素的元素都将从父元素的开头删除。除了我们为输出 contentLength 进行的 console.log 调用外，一切都按预期工作。contentLength 的大小不断增加，但它应该是 25。我认为这与我们正在进行 ajax 调用的事实有关，并且在 ajax 调用中此时 DOM 长度是“不正确的”。难道我做错了什么？我怎样才能解决这个问题？

    AJS.$.ajax({
        url: "ajax.action?",
        success: function (data) { 

                            //Cleanup and insert into parent div
                var divID   = "#" + insertContentIntoDiv;
                var wrapped = AJS.$("<div>" + data + "</div>");
                AJS.$(wrapped).find('title').remove().end();
                wrapped     = AJS.$(wrapped).find('meta').remove().end();
                AJS.$(divID + " dt:last-child").after(wrapped.html().trim());

                //Remove any whitespace pre-pended to parent element
                cleanWhiteSpaceFromElement(insertContentIntoDiv);

                //Remove child elements starting at beginning
                var parentElement = document.getElementById(insertContentIntoDiv);
                if(parentElement){

                    var contentLength = parentElement.childNodes.length;

                    console.log("________________cont: " + contentLength);
                    if(contentLength > 0){

                        var difference = contentLength - maxDisplayedLines;
                        console.log("___________removing: " + difference);
                        if(difference > 0){
                            AJS.$(divID + " dt:lt(" + difference + ")").remove();
                        }
                    } else {
                        console.log("ElementID " + insertContentIntoDiv + " appears to have no children. Was this expected?");
                    }
                } else {
                    console.log("ElementID " + insertContentIntoDiv + " NOT found. Log parsing will NOT be done");
                }
        },
        dataType: 'html'
    });
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