How to use the teleport component to achieve remote rendering in Vue3?

The teleport component in Vue 3 lets you render off-site

First, let's talk about what is teleport. In Vue 3, a teleport is a special kind of component that can render child components, slots, or slot contents away from their parent components. It's like "teleporting" data from one place to another.

To use the teleport component, you need to follow these steps:

First, you need to import the teleport component in your Vue 3 application. You can add the following code in the component's script tag:

import {
    
     Teleport } from 'vue'

Next, you can use the teleport component in your template. Here is a simple example:

<template>  
  <Teleport :to="'#destination'">  
    <!-- 这里是你的子组件或插槽内容 -->  
  </Teleport>  
</template>

In this example, we use the Teleport component and specify the rendering destination through the :to attribute. Here we render it to an element with the id "destination".

You can use teleport anywhere, such as in a button click event. Here is an example:

<template>  
  <button @click="teleport">传送</button>  
  <Teleport ref="teleport" :to="'#destination'">  
    <!-- 这里是你的子组件或插槽内容 -->  
  </Teleport>  
</template>  

In this example, we create a button and trigger the teleport on its click event. We used refthe attribute to refer to the Teleport component and then used it in the method.

Teleport can also be used for dynamic rendering. Here is an example of dynamic rendering:

<template>  
  <button @click="teleport">传送</button>  
  <div ref="destination"></div>  
</template>  

In this example, our render target is a dynamic div element that you can use in methods to render content dynamically.

More information and notes on using the teleport component in Vue 3:

Maintain state: When using the teleport component, you need to carefully maintain the state of the component. Because teleport renders child components or slot content away from their parent components, this may prevent parent components from directly accessing the state of child components.
Using events: In order to maintain communication between parent and child components of the teleport component, you can use events. You can trigger events in child components, then listen for events in parent components and respond accordingly.
Consider performance: the use of teleport components may have a certain impact on performance. If you need to use teleport frequently during rendering, it may cause performance degradation. Therefore, you need to consider optimizing your code to reduce the use of teleport.
Avoid repeated rendering: When using the teleport component, you need to ensure that the target location already exists on the page. If you use teleport multiple times during rendering, it may cause the same location to be rendered repeatedly, which may lead to unexpected results.
Using Vue Router: If you are having difficulty using the teleport component, you might consider using Vue Router to manage your routes and pages. Vue Router provides some features that can help you better use the teleport component.

Here's a more complex example showing how to use the teleport component for off-site rendering in Vue 3:

<template>  
  <div>  
    <button @click="teleportToDestination">传送</button>  
    <Teleport ref="teleport" :to="'#destination'">  
      <template v-slot:default="{ content }">  
        <div v-if="content">{
   
   { content }}</div>  
        <div v-else>正在加载中...</div>  
      </template>  
    </Teleport>  
  </div>  
</template>  
  
<script>  
import {
      
       Teleport } from 'vue'  
  
export default {
      
        
  components: {
      
       Teleport },  
  data() {
      
        
    return {
      
        
      message: 'Hello, Vue 3!'  
    }  
  },  
  methods: {
      
        
    teleportToDestination() {
      
        
      this.$refs.teleport.teleport('#destination')  
    }  
  }  
}  
}  
</script>

In this example, we create a button that, when clicked, triggers the teleportToDestination method, which uses the $refs property to reference the Teleport component and sets the destination to #destination.

Inside the Teleport component, we use a template with a slot that can receive subcomponents or slot content. Depending on whether content exists, we can display different content. If the content exists, display the content, otherwise display "Loading...".

This is just a simple example, you can change and extend this code according to your needs.

Hope this example can help you better understand how to use the teleport component to achieve remote rendering in Vue 3.