js中offsetWidth, clientWidth，offsetLeft和scrollLeft等的区别

       * {
            margin: 0;
            padding: 0;
        }

        .content {
            /*position: relative;*/
            /*top: 30px;
            left: 30px;*/
            width: 400px;
            height: 400px;
            border: 10px solid rgba(154, 205, 50, 0.62);
        }

        .box {
            /*position: absolute;*/
            /*top: 40px;*/
            /*left: 40px;*/
            width: 200px;
            height: 200px;
            margin: 10px;
            border: 10px solid rgba(255, 0, 0, 0.61);
            padding: 50px;
            overflow-x: hidden;
            overflow-y: scroll;
        }

        .child {
            width: 200px;
            height: 500px;
        }

<div class="content">
    <div class="box">
        <div class="child">
            我是内容
        </div>
    </div>
</div>

下面为效果图：

现在开始区分