Vue驼峰与短横线分割命名中有哪些坑

<template>
  <div class="border">
    <h2>我是子组件</h2>
  </div>
</template>
<script setup>
</script>
<style scoped>
.border {
  border: 1px solid;
  width: 400px;
}
</style>

createApp(App)
    .component('MyComponent', MyComponent)
    .mount('#app')

<template>
  <div class="border">
    <h1 >我是父组件</h1>
    <my-component />
    <!-- <MyComponent /> -->
    <!-- <myComponent /> -->
  </div>
</template>
<style scoped>
.border {
  border: 1px solid;
  width: 400px;
  height: 200px;
}
</style>

<MyComponent :user-name="name"/>

<template>
  <div class="border">
    <h2>我是子组件</h2>
    <div>接收来自父组件传入的参数:{{ props.userName }}</div>
  </div>
</template>
<script setup lang="ts">
import { computed, defineProps, withDefaults } from "vue";
interface Props {
  // 记得使用驼峰命名法
  userName: string;
}
const props = withDefaults(defineProps<Props>(), {
  userName: "",
});
</script>
<style scoped>
.border {
  border: 1px solid;
  width: 400px;
}
</style>

<MyComponent :user-name="name" @sayHello="sayHello"/>
const sayHello =  ()=>{
  console.log('Hello')
}

<template>
  <div class="border">
    <h2>我是子组件</h2>
    <div>接收来自父组件传入的参数:{{ props.userName }}</div>
    <a @click="hello">点击</a>
    <br>
    <a @click="hello2">点击2</a>
  </div>
</template>
<script setup lang="ts">
import { defineProps, withDefaults } from "vue";
interface Props {
  userName: string;
}
const props = withDefaults(defineProps<Props>(), {
  userName: "",
});
const emit = defineEmits(["say-hello", "sayHello"]);
const hello = () => {
  emit("say-hello");
};
const hello2 = () => {
  emit("sayHello");
};
</script>
<style scoped>
.border {
  border: 1px solid;
  width: 400px;
}
</style>