Changes in Vue3 compared to Vue2: better server-side rendering support

Changes in Vue3 compared to Vue2: Better server-side rendering support

Vue is a popular JavaScript framework for building user interfaces. Vue3 is the latest version of the Vue framework, which brings many improvements and new features compared to Vue2. One of the most significant improvements is support for server-side rendering (SSR). This article will introduce Vue3's improvements in server-side rendering and provide some code examples.

Server-side rendering (SSR) is a technology that generates a complete HTML page on the server and sends it to the browser. It provides better performance, better SEO, and better user experience. Vue3 has been optimized in server-side rendering, making it easier for developers to use SSR.

In Vue2, we use the vue-server-renderer package for server-side rendering. However, Vue3 has integrated the server-side rendering function into the Vue core library.

First, we need to install the latest version of Vue3.

npm install vue@next

Next, introduce Vue3 into the server-side code and create a Vue instance.

const { createApp } = require('vue')

const app = createApp({
  // 你的应用程序逻辑
})

// 在这里设置服务器端渲染的路由和其他配置

// 将Vue实例转换为HTML字符串，并发送给客户端
app.renderToString().then(html => {
  res.send(html)
})

In the above code, we create a Vue instance using the createApp function and pass it to the app.renderToString() method, which will Vue instance converted to HTML string. Then, we send the HTML string to the client.

In addition to basic server-side rendering, Vue3 also provides some other improvements and features. For example, Vue3 component instances can be serialized and deserialized on the server. This means we can save component state on the server side and restore it on the client side. This is very helpful for improving performance and user experience.

The following is a simple example showing how to serialize and deserialize component state on the server.

// 在服务器上进行序列化
import { createSSRApp, ssrSerialize } from 'vue'

const app = createSSRApp({
  // 你的应用程序逻辑
})

// ...设置服务器端渲染的路由和其他配置

const serialized = ssrSerialize(app)

// 在客户端进行反序列化
import { createApp, ssrHydrate } from 'vue'

const serializedData = // 从服务器获取序列化的组件状态

const app = createApp({
  // 你的应用程序逻辑
})

ssrHydrate(app, serializedData)
app.mount('#app')

In the above example, we use the createSSRApp function to create a server-side rendering (SSR) application instance and use the ssrSerialize function to serialize it. Then, on the client side, we create a client-side rendering (CSR) application instance using the createApp function and deserialize the serialized component state using the ssrHydrate function, and Mount it on the DOM.

To summarize, Vue3 has some important improvements compared to Vue2 in server-side rendering. It integrates the server-side rendering function into the Vue core library, making it easier for developers to use server-side rendering. In addition, Vue3 also provides some new features, such as serialization and deserialization of component state. These improvements and features help improve performance, SEO, and user experience.

The above is an article about the changes in Vue3 compared to Vue2: better server-side rendering support. I hope this article will help you understand the improvements in server-side rendering of Vue3.

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