Vue-实现点击空白处隐藏某节点

<template>
  <div>
    <span ref="projectButton">
      <el-popover v-model="visible" trigger="manual" placement="bottom" @show="show" @hide="hide">
        <p>啦啦啦</p>
        <el-button slot="reference" type="primary" @click="visible = !visible">show</el-button>
      </el-popover>
    </span>
  </div>
</template>
<script>
export default {
  data() {
    return {
      visible: false,
    }
  },
  methods: {
    show() {
      document.addEventListener('click', this.hidePanel, false)
    },
    hide() {
      document.removeEventListener('click', this.hidePanel, false)
    },
    hidePanel(e) {
      if (!this.$refs.projectButton.contains(e.target)) {
        this.visible = false
        this.hide()
      }
    },
  },
}
</script>

<template>
  <div>
    <div class="show" v-show="show" v-clickoutside="handleClose">
      显示
    </div>
  </div>
</template>
<script>
const clickoutside = {
  // 初始化指令
  bind(el, binding, vnode) {
    function documentHandler(e) {
      // 这里判断点击的元素是否是本身，是本身，则返回
      if (el.contains(e.target)) {
        return false
      }
      // 判断指令中是否绑定了函数
      if (binding.expression) {
        // 如果绑定了函数 则调用那个函数，此处binding.value就是handleClose方法
        binding.value(e)
      }
    }
    // 给当前元素绑定个私有变量，方便在unbind中可以解除事件监听
    el.__vueClickOutside__ = documentHandler
    document.addEventListener('click', documentHandler)
  },
  update() {},
  unbind(el, binding) {
    // 解除事件监听
    document.removeEventListener('click', el.__vueClickOutside__)
    delete el.__vueClickOutside__
  },
}
export default {
  name: 'HelloWorld',
  data() {
    return {
      show: true,
    }
  },
  directives: { clickoutside },
  methods: {
    handleClose(e) {
      this.show = false
    },
  },
}
</script>
    <!-- Add "scoped" attribute to limit CSS to this component only -->
    <style scoped>
.show {
  width: 100px;
  height: 100px;
  background-color: red;
}
</style>

<template>
  <div>
    <div class="mask" v-if="showModal" @click="showModal=false"></div>
    <div class="pop" v-if="showModal">
      <button @click="showModal=false" class="btn">点击出现弹框</button>
    </div>
    <button @click="showModal=true" class="btn">点击出现弹框</button>
  </div>
</template>
     
<script>
export default {
  data() {
    return {
      showModal: false,
    }
  },
}
</script>
     
<style scoped>
.mask {
  background-color: #000;
  opacity: 0.3;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.pop {
  background-color: #fff;
  position: fixed;
  top: 100px;
  left: 300px;
  width: calc(100% - 600px);
  height: calc(100% - 200px);
  z-index: 2;
}
.btn {
  background-color: #fff;
  border-radius: 4px;
  border: 1px solid blue;
  padding: 4px 12px;
}
</style>