vue2的$listeners的使用
listeners用于多层次组件传递事件监听器,爷爷辈组件向父辈、孙子辈、曾孙子辈……组件传递事件(与$attrs不同,不存在半路被拦截的情况)父亲通过点击div触发click事件,同时向孙子(GrandSon)传递$listeners。爷爷(GrandFather)给父亲(Father)绑定一个click事件。写法如下(注v-on不能用简写@,虽然不报错,但是也不生效)...
·
$listeners
$listeners 用于多层次组件传递事件监听器,爷爷辈组件向父辈、孙子辈、曾孙子辈……组件传递事件(与 $attrs 不同,不存在半路被拦截的情况)
写法如下:(注:v-on 不能用简写 @,虽然不报错,但是也不生效)
<grand-son v-on="$listeners" />
面继续使用 爷爷-> 父亲 -> 孙子 的栗子:
爷爷(GrandFather)给父亲(Father)绑定一个 click 事件
父亲通过点击 div 触发 click 事件,同时向孙子(GrandSon)传递 $listeners
<!-- GrandFather.vue -->
<template>
<div>
GrandFather:
<father :msg1="msg1" :msg2="msg2" @click="handleClick" />
</div>
</template>
<script>
import Father from './Father.vue'
export default {
components: { Father },
data() {
return {
msg1: 'msg1',
msg2: 'msg2'
}
},
methods: {
handleClick() {
console.log('trriger click')
}
}
}
</script>
<!-- Father.vue -->
<template>
<div>
<div @click="handleFatherClick">Father: {{ msg1 }}</div>
<grand-son v-bind="$attrs" v-on="$listeners" />
</div>
</template>
<script>
import GrandSon from './GrandSon.vue'
export default {
components: { GrandSon },
props: ['msg1'],
methods: {
handleFatherClick() {
console.log('father click')
this.$emit('click')
}
}
}
</script>
<!-- GrandSon.vue -->
<template>
<div @click="handleSonClick">GrandSon: {{ msg1 }}{{ msg2 }}</div>
</template>
<script>
export default {
props: ['msg1', 'msg2'],
methods: {
handleSonClick() {
console.log('grandson click')
this.$emit('click')
}
}
}
</script>
- 界面:
- 点击 Father: msg1,控制台显示:
- 点击 GrandSon: msg2,控制台显示:
更多推荐
已为社区贡献4条内容
所有评论(0)