Vue3中的Teleport与Portal的区别分析

<template>
  <div>
    <button @click="showModal = true">打开模态框</button>
    
    <teleport to="body">
      <div v-if="showModal" class="modal">
        <div class="modal-content">
          <span class="close" @click="showModal = false">&times;</span>
          <h2>模态框标题</h2>
          <p>这是模态框的内容。</p>
        </div>
      </div>
    </teleport>
  </div>
</template>

<script>
export default {
  data() {
    return {
      showModal: false,
    };
  },
};
</script>

<style>
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background: white;
  padding: 20px;
  border-radius: 5px;
}
</style>

<template>
  <div>
    <button @click="togglePortal">切换 Portal</button>
    
    <portal v-if="isVisible" :to="portalTarget">
      <div class="portal-content">
        <h2>这是Portal内容</h2>
        <p>Portal可以灵活地在任何地方渲染组件。</p>
      </div>
    </portal>
    
    <div id="portal-target" style="position: fixed; top: 20px; right: 20px;"></div>
  </div>
</template>

<script>
export default {
  data() {
    return {
      isVisible: false,
      portalTarget: "#portal-target",
    };
  },
  methods: {
    togglePortal() {
      this.isVisible = !this.isVisible;
    },
  },
};
</script>

<style>
.portal-content {
  background: lightblue;
  padding: 20px;
  border: 1px solid blue;
  border-radius: 5px;
}
</style>