javascript appendChild 没有工作并给我一个 [object] 结果

javascript appendChild did not work and give me an [obect] result

运行 下面的代码,我得到的结果是这样的:

[object HTMLHeadingElement]
[object HTMLHeadingElement]
[object HTMLHeadingElement]
[object HTMLHeadingElement] 

但它应该有一些 ul 列表的结果。我不知道我哪里错了。我错过了什么?

function textContent(ele,value){
    var content = ele.textContent;//check if textContent is defined
    if(value === undefined){//no value passed, so return current text

        if(content !== undefined) return content;
        else return ele.innerText;

    }else{//a value is passed, so set text

        if(content !== undefined)  ele.textContent = value;
        else ele.innerText = value;

    }
}


(function(){
    var titles = document.querySelectorAll('.docHomeDetails h3');
    var sideList = document.getElementsByClassName('sideList')[0];
    var ul = document.querySelectorAll('.sideList ul')[0];


    window.onload = function(){
        for(var i = 0; i< titles.length; i++){

            var  li = document.createElement('li');

            textContent(li, titles[i]);//setting plain text into li element
            ul.appendChild(li);

        }                       
    }

}());

错误在这里:

textContent(li, titles[i]);//setting plain text into li element

您尝试分配元素本身而不是其中的文本。应该是:

textContent(li, titles[i].innerHTML);

我的fiddle.