Vue3内置组件Teleport使用方法详解

// 渲染到body标签下
<teleport to="body">
  <div class="modal">
    I'm a teleported modal! 
  </div>
</teleport>

<teleport to="#some-id" />
<teleport to=".some-class" />
<teleport to="[data-teleport]" />

<template>
  <teleport to="body">
    <transition name="dialog-fade">
      <div class="dialog-wrapper" v-show="visible">
        <div class="dialog">
          <div class="dialog-header">
            <slot name="title">
              <span class="dialog-title">
                {{ title }}
              </span>
            </slot>
          </div>
          <div class="dialog-body">
            <slot></slot>
          </div>
          <div class="dialog-footer">
            <slot name="footer">
              <button @click="onClose">关闭</button>
            </slot>
          </div>
        </div>
      </div>
    </transition>
  </teleport>
</template>

<script>
import { defineComponent } from 'vue';

export default defineComponent({
  name: 'tdialog'
});
</script>

<script setup>
const props = defineProps({
  title: String,
  visible: Boolean
});

const emit = defineEmits(['close']);

const onClose = () => {
  emit('close');
};
</script>

<t-dialog title="LGD是不可战胜的" :visible="visible" @close="onClose"> 这是一段内容，萧瑟仙贝。 </t-dialog>

// ...
const visible = ref(false);

const onDialog = () => {
  visible.value = !visible.value;
};

const onClose = () => {
  visible.value = false;
};

// 呼出一个提示
Message({ message: '这是一条Message消息' });

const Message = options => {
  // 准备渲染容器
  const container = document.createElement('div');
  // 生成vnode
  const vnode = createVNode(MessageConstructor, options);
  // 渲染
  render(vnode, container);
};

<template>
  <teleport to="#app">
    <transition name="message-fade">
      <div v-show="visible" ref="ins" class="message" :style="customStyle">{{ message }}</div>
    </transition>
  </teleport>
</template>