Question

用JS或者JQ写多个点击预览和点击上传功能，点击预览会弹出一个遮罩层来显示图片

点击预览显示相对应的图片

Answer 1

        .onwindow {
            position: fixed;
            top: 43%;
            left: 43%;
            z-index: 99;
            width: 250px;
            height: 135px;
            background-color: rgba(255,255,255,1);
            display:none;
            border:2px solid red;
            border-radius:15px;
            padding:10px;
        }

        .plank {
            position: fixed;
            top: 0;
            bottom: 0;
            left: 0;
            right: 0;
            background-color: rgba(255,255,255,0.8);
            width: 100%;
            display: none;
        }

        <div class="onwindow">//显示窗口
        <image>...........
        </div>
        <div class="plank"></div>//背景

  var hide =()=>{$(".onwindow").hide();$(".plank").hide();}
  var show =()=>{$(".onwindow").show();$(".plank").show();}