vue修饰符.sync
.sync 修饰符官网介绍，多用于父子组件数据双向绑定
用法demo dialog例子1
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76// 父组件
<template>
<div>
<button @click="show = !show" class="btn-switch">开关</button>
<c-dialog :show.sync="show"></c-dialog>
</div>
</template>
<script>
import dialog from "./components/dialog";
export default {
data() {
return {
show: true
};
},
components: {
"c-dialog": dialog
}
};
</script>
<style lang="less" scoped>
.btn-switch {
margin-bottom: 10px;
}
</style>
//子组件
<template>
<div>
<div class="box" v-show="visible">
展示
<button class="btn-close" @click="visible = !visible">X</button>
</div>
</div>
</template>
<script>
export default {
props: {
show: {
type: Boolean,
default: true
}
},
computed: {
visible: {
get() {
return this.show;
},
set(val) {
this.$emit("update:show", val);
}
}
}
};
</script>
<style lang="less" scoped>
.box {
position: relative;
margin: 0 auto;
width: 200px;
display: flex;
justify-content: center;
align-items: center;
height: 100px;
border: 1px solid red;
}
.btn-close {
position: absolute;
right: 5px;
top: 5px;
}
</style>
$attrs & $listeners
$attrs官网介绍，$listeners官网介绍,两者多用于创建高层次的组件
demo如下1
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67//爷爷组件
<template>
<div>
这是爷爷组件，这是爷爷收到的消息:{{ text }}
<c-children :msg="msg" @changeText="handleTextChange"></c-children>
</div>
</template>
<script>
import children from "./components/children";
export default {
data() {
return {
msg: "我是爷爷啊",
text: "未收到消息"
};
},
components: {
"c-children": children
},
methods: {
handleTextChange(val) {
this.text = val;
}
}
};
</script>
//父组件
<template>
<div>
这是儿子组件
<c-grandson v-bind="$attrs" v-on="$listeners"></c-grandson>
</div>
</template>
<script>
import grandson from "./grandson";
export default {
components: {
"c-grandson": grandson
}
};
</script>
//子组件
<template>
<div>
这是孙子组件，收到的消息:{{ msg }}
<button @click="$emit('changeText', '我是孙子啊')">给爷爷发消息</button>
</div>
</template>
<script>
export default {
props: {
msg: {
type: String,
default: "1"
}
}
};
</script>
<style lang="scss" scoped></style>
