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vue
<script setup>
import HelloWorld from './components/HelloWorld.vue'

function carried(value) {
  alert(`牛呀,都实现了!!!${value}`)
}
</script>

<template>
  <p>❀❀❀❀❀❀❀❀❀❀❀❀---app--vue---❀❀❀❀❀❀❀❀❀❀❀</p>

  <HelloWorld msg="Vite + Vue" wish="不掉发" wishes="变瘦" @carried="carried">
    <h3>实现插槽1</h3>

    <template v-slot:dome>
      <h4>实现插槽2</h4>
    </template>
  </HelloWorld>

  <p>❀❀❀❀❀❀❀❀❀❀❀❀---app--vue---❀❀❀❀❀❀❀❀❀❀❀</p>
</template>

<style scoped>
* {
  color: red;
}
</style>

在setup 语法糖中,setup可以接收两个参数,第一个参数是 props,也就是组件传值;第二个参数是context,上下文对象,context里面还有三个很重要的东西attrsslotsemit

vue
<script setup>
import { ref } from 'vue'
defineProps({
  msg: String,
  wish: String,
  wishes: String
})
const emit = defineEmits(['carried'])

function dream() {
  emit('carried', 666)
}
</script>

<template>
  <p>=================helloworld================</p>
  <h1>{
  { msg }}</h1>
  <button @click="dream">点击实现</button>
  <slot></slot>
  <slot name="dome"></slot>
  <p>=================helloworld================</p>
</template>

<style scoped>
* {
  color: aqua;
}
button {
  background-color: aqua;
  color: white;
}
</style>

img

 img