How to implement a simple pop-up box using JS

This article mainly analyzes how to use JS to implement a minimalist pop-up box. Friends who need it can refer to it. I hope it can help everyone. Let’s take a look with the editor below.

• There are two p’s forming a pop-up box. The level of two p's is brotherhood.

• One p is to block the content behind

• The second p is In order to display the actual content of the popup box

  ##HTML part

  ##

  !-- 这个是用来遮罩的 --><p id="modelp"></p><!-- 这个是用来展示弹框内容的 --><p id="model">
  <p style="float: right;height: 20px; width: 20px;border-radius: 50%; border: 2px solid red;text-align: center;" onclick="closeModel()">
          X    </p>
      弹出窗口</p>

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• CSS part

  // 遮挡部分CSS#modelp {        height: 100%;
          width: 100%;
          // 页面定位到最上面
          position: absolute;
          top:0;
          left:0;
          background: silver;
          // 透明度这样能看到后面的内容效果真实一些
          opacity:0.8;
          // 遮挡级别最好高一些，防止别的内容会突然出现在你的弹出层上面，这就尴尬了。
          z-index: 99;
      }    // 弹出框内容CSS
      #model {        width: 300px;
          height: 200px;
          background: #959FA9;
          border-radius: 10px;
          padding: 15px;
          position: absolute;
          top: 200px;
          left: 42%;
          z-index: 99;
      }

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• JavaScript part

  // 页面一进入就打开了弹出框。所以直接遮挡// 此处是用来解决如果你的页面过大会出现滚动条，这样遮罩层只能遮挡你的可见部分滚动内容无法折腾的问题。document.body.style.overflow = 'hidden';/**
  * 关闭弹出框的功能
  */function closeModel() {
          document.getElementById("model").style.display = 'none';
          document.getElementById("modelp").style.display = 'none';        // 不遮挡后面的内容将body设置为原始样式，也就是实现可滚动
          document.body.style.overflow = 'auto';
      }

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