例如
html

 <div nodeid="1_2">
        <a id="d" href="index.html">知識</a>
    </div>
    <div nodeid="1_3">
    </div>
    <div nodeid="1_4">
    </div>
    <div nodeid="1_5">
    </div>
    <div nodeid="1_6">

js

var div = document.querySelector('div[nodeid="1_2"]');
        var value = div.innerHTML.replace(/<.*?>/g,"\n");
        var detachObj = null;
        div.innerHTML = value;
        console.log(value);
        // div.parentNode.removeChild()    //直接刪除節(jié)點
        detachObj1 = $("div[nodeid=\'1_2\']> a").detach();  //保留移除的數(shù)據(jù)和事件 ，允許以后重新插入