需求：

点击按钮弹出右侧抽屉，弹出抽屉后点击左侧空白处以及右上角的×进行关闭抽屉。

实现：

组件代码：

<!--Sider.vue-->
<template>
  <div
    :style="'width:' + browidth + 'px;height:' + broheight + 'px'"
    :class="status === false ? 'main-right' : 'main-left'"
    @click="closeDrawer"
  >
    <div
      class="drawer"
      :class="status === false ? 'drawer-right' : 'drawer-left'"
      @click="clickBlank"
    >
      <div><span @click="closeDrawer">&#xe624;</span></div>
      <div>
        <ul>
          <li v-for="(item, index) in arr" :key="index">
            <span v-html="item.icon"></span>
            <span>{{ item.text }}</span>
          </li>
        </ul>
      </div>
    </div>
  </div>
</template>

<script>
import { reactive, toRefs } from "vue";
export default {
  props: {
    status: {
      type: Boolean,
      default: false,
    },
  },
  emits: ["update:status"],
  setup(props, context) {
    const state = reactive({
      browidth: window.innerWidth,
      broheight: window.innerHeight,
      arr: [
        {
          text: "历史成绩",
          icon: "&#xe640;",
        },
        {
          text: "雷达图示",
          icon: "&#xe640;",
        },
        {
          text: "趋势图示",
          icon: "&#xeb96;",
        },
        {
          text: "成绩排名",
          icon: "&#xeb96;",
        },
        {
          text: "修改密码",
          icon: "&#xe640;",
        },
      ],
    });
    const clickBlank = (event) => {
      event.stopPropagation();
    };
    const closeDrawer = (event) => {
      event.stopPropagation();
      context.emit("update:status", false);
    };
    return {
      ...toRefs(state),
      closeDrawer,
      clickBlank,
    };
  },
};
</script>

<style>
@font-face {
  font-family: "iconfont"; /* Project id 3062537 */
  src: url("//at.alicdn.com/t/font_3062537_lzgm1f4z4wb.woff2?t=1640444212722")
      format("woff2"),
    url("//at.alicdn.com/t/font_3062537_lzgm1f4z4wb.woff?t=1640444212722")
      format("woff"),
    url("//at.alicdn.com/t/font_3062537_lzgm1f4z4wb.ttf?t=1640444212722")
      format("truetype");
}
.main-right {
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
}
.main-left {
  position: fixed;
  top: 0;
  left: 0;
  background-color: rgba(61, 59, 59, 0.3);
  transition: all 1s;
}
.drawer {
  width: 250px;
  height: 100vh;
  background-color: white;
  transition: transform 0.3s cubic-bezier(0.7, 0.3, 0.1, 1),
    box-shadow 0.3s cubic-bezier(0.7, 0.3, 0.1, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  /* justify-content: space-around; */
}
.drawer > div:nth-child(1) {
  height: 6%;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}
.drawer > div:nth-child(1) > span {
  padding: 20px;
  font-family: "iconfont";
  cursor: pointer;
}
.drawer > div:nth-child(2) {
  height: 90%;
  width: 100%;
}
.drawer-right {
  position: fixed;
  top: 0;
  right: -250px;
}
.drawer-left {
  box-shadow: 4px 4px 15px rgb(61, 59, 59);
  position: fixed;
  top: 0;
  right: -250px;
  transform: translateX(-250px);
}
ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}
li {
  height: 50px;
  padding: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: #cccccc 1px solid;
}
li:hover {
  background-color: antiquewhite;
}
li > span {
  font-family: "iconfont";
  padding: 10px;
  font-size: 1.3rem;
}
</style>

引用：

<!--Home.vue-->
<template>
  <div class="home">
    <button @click="click">点击</button>
    <HelloWorld v-model:status="status" />
  </div>
</template>

<script lang="ts">
import HelloWorld from "@/components/Sider.vue"; // @ is an alias to /src
import { reactive, toRefs } from "@vue/reactivity";
// import HelloWorld from '@/components/HelloWorld.vue'; // @ is an alias to /src
export default {
  components: {
    HelloWorld,
  },
  setup() {
    const state = reactive({
      status: false,
    });
    const click = () => {
      state.status = true;
    };
    return {
      ...toRefs(state),
      click,
    };
  },
};
</script>

注意：要考虑到事件冒泡，事件冒泡通过event.stopPropagation()进行阻止。

我会将自己平时项目中常见的问题以及笔试面试的知识在CSDN与大家分享，一起进步，加油。