详解Vue3 SFC 和 TSX 方式调用子组件中的函数

<template>
  <el-button type="primary" @click="demoFun('child')">demo component sfc</el-button>
</template>

<script lang="ts" setup name="demo-component-sfc">
const demoFun = (str: string) => {
  console.log('demo component sfc', str)
}
// 使用 defineExpose 暴露组件内部的方法
defineExpose({ demoFun })
</script>

import { defineComponent } from 'vue'

export default defineComponent({
  name: 'demo-component-tsx',
  setup (props, context) {
    const demoFun = (str: string) => {
      console.log('demo component tsx', str)
    }

    // 使用 expose 暴露组件内部的方法
    context.expose({ demoFun })

    return () => (
      <el-button type="primary" onClick={() => demoFun('child')}>demo component tsx</el-button>
    )
  }
})

import { defineComponent } from 'vue'

export default defineComponent({
  name: 'demo-component-tsx',
  setup (props, context) {
    const demoFun = (str: string) => {
      console.log('demo component tsx', str)
    }

    // 使用 expose 暴露组件内部的方法
    context.expose({ demoFun })

    return () => (
      <el-button type="primary" onClick={() => demoFun('child')}>demo component tsx</el-button>
    )
  }
})

import { defineComponent, ref } from 'vue'
import DemoComponentSfc from '@/components/ref/demo-component-sfc.vue'
import DemoComponentTsx from '@/components/ref/demo-component-tsx'

export default defineComponent({
  name: 'demo-ref-tsx',
  setup () {
    const sfcRef = ref()

    const onBtnClick1 = () => {
      if (sfcRef.value) {
        sfcRef.value && sfcRef.value.demoFun('parent')
      }
    }

    const tsxRef = ref()

    const onBtnClick2 = () => {
      if (tsxRef.value) {
        tsxRef.value && tsxRef.value.demoFun('parent')
      }
    }
    return () => (
      <>
        <div>
          <DemoComponentSfc ref={sfcRef} />
          <el-button onClick={onBtnClick1}>parent button</el-button>
        </div>

        <div style="margin-top: 10px;">
          <DemoComponentTsx ref={tsxRef} />
          <el-button onClick={onBtnClick2}>parent button</el-button>
        </div>
      </>
    )
  }
})