文档

• https://developer.mozilla.org/zh-CN/docs/Web/CSS/pointer-events

pointer-events CSS 属性指定在什么情况下 (如果有) 某个特定的图形元素可以成为鼠标事件的 target

常用属性

/* Keyword values */
pointer-events: auto; /* 与pointer-events属性未指定时的表现效果相同 */
pointer-events: none; /* 元素永远不会成为鼠标事件的target */

/* Global values */
pointer-events: inherit;
pointer-events: initial;
pointer-events: unset;

案例一

看一段 css 和 js 代码，由里到外嵌套

<style>
      .box-green {
        width: 800px;
        height: 300px;
        background-color: green;
      }

      .box-yellow {
        width: 500px;
        height: 250px;
        background-color: yellow;
      }

      .box-red {
        width: 300px;
        height: 200px;
        background-color: red;
      }
    </style>

    <div
      class="box-green"
      id="box-green"
    >
      <div
        class="box-yellow"
        id="box-yellow"
      >
        <div
          class="box-red"
          id="box-red"
        ></div>
      </div>
    </div>

    <script>
      let boxGreen = document.querySelector('#box-green')
      let boxYellow = document.querySelector('#box-yellow')
      let boxRed = document.querySelector('#box-red')

      boxGreen.addEventListener('click', function () {
        console.log('boxGreen click')
      })

      boxYellow.addEventListener('click', function () {
        console.log('boxYellow click')
      })

      boxRed.addEventListener('click', function () {
        console.log('boxRed click')
      })
    </script>

点击红色部分 事件触发顺序

boxRed click
boxYellow click
boxGreen click

点击黄色部分 事件触发顺序

boxYellow click
boxGreen click

点击绿色部分 事件触发顺序

boxGreen click

案例二

修改一下布局，外层相对定位，内层绝对定位

<style>
      .box-green {
        width: 800px;
        height: 300px;
        background-color: green;
        position: relative;
      }

      .box-yellow {
        position: absolute;
        left: 0;
        width: 300px;
        height: 250px;
        background-color: yellow;
      }

      .box-red {
        position: absolute;
        right: 0;
        width: 300px;
        height: 250px;
        background-color: red;
      }
    </style>

    <div
      class="box-green"
      id="box-green"
    >
      <div
        class="box-yellow"
        id="box-yellow"
      ></div>

      <div
        class="box-red"
        id="box-red"
      ></div>
    </div>

    <script>
      let boxGreen = document.querySelector('#box-green')
      let boxYellow = document.querySelector('#box-yellow')
      let boxRed = document.querySelector('#box-red')

      boxGreen.addEventListener('click', function () {
        console.log('boxGreen click')
      })

      boxYellow.addEventListener('click', function () {
        console.log('boxYellow click')
      })

      boxRed.addEventListener('click', function () {
        console.log('boxRed click')
      })
    </script>

点击绿色部分 事件触发顺序

boxGreen click

点击黄色部分 事件触发顺序

boxYellow click
boxGreen click

点击红色部分 事件触发顺序

boxRed click
boxGreen click

如果设置css属性

.box-red {
  position: absolute;
  right: 0;
  width: 300px;
  height: 250px;
  background-color: red;
  /* 取消鼠标事件 */
  pointer-events: none;
}

点击红色区域，只会触发如下事件，实现了穿透效果

boxGreen click

参考
css 点击穿透 pointer-events: none；一般用于遮罩