vue3—TSX

TSX

Install

npm install @vitejs/plugin-vue-jsx -D

1. vite.config.ts configuration

import { fileURLToPath, URL } from 'node:url'

import { defineConfig } from 'vite'
import vue from '@vitejs/plugin-vue'
import vueJsx from '@vitejs/plugin-vue-jsx'

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue(), vueJsx()],
  resolve: {
    alias: {
      '@': fileURLToPath(new URL('./src', import.meta.url))
    }
  }
})

2. Modify the tsconfig.json configuration file

    "jsx": "preserve",
    "jsxFactory": "h",
    "jsxFragmentFactory": "Fragment",

3. Use TSX

 import { ref } from 'vue'
 
let v = ref<string>('')
 
const renderDom = () => {
    return (
        <>
           <input v-model={v.value} type="text" />
           <div>
               {v.value}
           </div>
        </>
    )
}
 
export default renderDom

3.1.v-model

import { ref } from 'vue'
 
let v = ref<string>('')
 
const renderDom = () => {
    return (
        <>
           <input v-model={v.value} type="text" />
           <div>
               {v.value}
           </div>
        </>
    )
}
 
export default renderDom

3.2.v-show

import { ref } from 'vue'
 
let flag = ref(false)
 
const renderDom = () => {
    return (
        <>
           <div v-show={flag.value}>景天</div>
           <div v-show={!flag.value}>雪见</div>
        </>
    )
}
 
export default renderDom

3.3.v-if is not supported

import { ref } from 'vue'
 
let flag = ref(false)
 
const renderDom = () => {
    return (
        <>
            {
                flag.value ? <div>景天</div> : <div>雪见</div>
            }
        </>
    )
}
 
export default renderDom

3.4.v-for also does not support

import { ref } from 'vue'
 
let arr = [1,2,3,4,5]
 
const renderDom = () => {
    return (
        <>
            {
              arr.map(v=>{
                  return <div>${v}</div>
              })
            }
        </>
    )
}
 
export default renderDom

3.5.v-bind

import { ref } from 'vue'
 
let arr = [1, 2, 3, 4, 5]
 
const renderDom = () => {
    return (
        <>
            <div data-arr={arr}>1</div>
        </>
    )
}
 
export default renderDom

3.6.v-on binding event All events follow the react style

• All events start with on
• All event names are capitalized

const renderDom = () => {
    return (
        <>
            <button onClick={clickTap}>点击</button>
        </>
    )
}
 
const clickTap = () => {
    console.log('click');
}
 
export default renderDom

3.7. Props accepted values

import { ref } from 'vue'
 
type Props = {
    title:string
}
 
const renderDom = (props:Props) => {
    return (
        <>
            <div>{props.title}</div>
            <button onClick={clickTap}>点击</button>
        </>
    )
}
 
const clickTap = () => {
    console.log('click');
}
 
export default renderDom

3.8. Emit distribution

type Props = {
    title: string
}
 
const renderDom = (props: Props,content:any) => {
    return (
        <>
            <div>{props.title}</div>
            <button onClick={clickTap.bind(this,content)}>点击</button>
        </>
    )
}
 
const clickTap = (ctx:any) => {
 
    ctx.emit('on-click',1)
}

3.9.Slot

const A = (props, { slots }) => (
  <>
    <h1>{ slots.default ? slots.default() : 'foo' }</h1>
    <h2>{ slots.bar?.() }</h2>
  </>
);
 
const App = {
  setup() {
    const slots = {
      bar: () => <span>B</span>,
    };
    return () => (
      <A v-slots={slots}>
        <div>A</div>
      </A>
    );
  },
};
 
// or
 
const App = {
  setup() {
    const slots = {
      default: () => <div>A</div>,
      bar: () => <span>B</span>,
    };
    return () => <A v-slots={slots} />;
  },
};
 
// or you can use object slots when `enableObjectSlots` is not false.
const App = {
  setup() {
    return () => (
      <>
        <A>
          {
   
   {
            default: () => <div>A</div>,
            bar: () => <span>B</span>,
          }}
        </A>
        <B>{() => "foo"}</B>
      </>
    );
  },
};

Attachment: implement a vite plug-in to parse tsx

third-party plug-ins

npm install @vue/babel-plugin-jsx
npm install @babel/core
npm install @babel/plugin-transform-typescript
npm install @babel/plugin-syntax-import-meta
npm install @types/babel__core

plugin code

import type { Plugin } from 'vite'
import * as babel from '@babel/core'; //@babel/core核心功能：将源代码转成目标代码。
import jsx from '@vue/babel-plugin-jsx'; //Vue给babel写的插件支持tsx v-model等
export default function (): Plugin {
    return {
        name: "vite-plugin-tsx",
        config (config) {
           return {
              esbuild:{
                 include:/\.ts$/
              }
           }
        },
        async transform(code, id) {
            if (/.tsx$/.test(id)) {
                //@ts-ignore
                const ts = await import('@babel/plugin-transform-typescript').then(r=>r.default)
                const res = babel.transformSync(code,{
                    plugins:[jsx,[ts, { isTSX: true, allowExtensions: true }]], //添加babel插件
                    ast:true, // ast: 抽象语法树，源代码语法结构的一种抽象表示。babel内部就是通过操纵ast做到语法转换。
                    babelrc:false, //.babelrc.json
                    configFile:false //默认搜索默认babel.config.json文件
                })
                return res?.code //code: 编译后的代码
            }
           
            return code
        }
    }
}