先貼代碼: 自己可以試試
<template>
<div style="margin: 50px">
<span>xiaoming:{{xiaoming}}</span><br>
<span>zhangsan:{{zhangsan}}</span><br>
<span>lisi:{{lisi}}</span><br>
<span>myAddress:{{myAddress}}</span><br>
<input v-model="classc"><br>
<input v-model="grade"><br>
<input v-model="city"><br>
<input v-model="county"><br>
<input v-model="treet"><br>
</div>
</template>
<script>
export default {
data: function () {
return{
grade: '6',//年紀
classc: '3',//班級
xiaoming: '',
zhangsan:'',
lisi:'',
city: '北京',//地市
county: '朝陽區',//區縣
treet: '解放大道'//街道
}
},
computed: {
myAddress: function() {//我的地址
return this.city + this.county + this.treet;
}
},
watch:{
grade: function(){
this.xiaoming = this.grade + '年級' + this.classc + '班的小明';
this.zhangsan = this.grade + '年級' + this.classc + '班的張三';
this.lisi = this.grade + '年級' + this.classc + '班的李四';
},
classc: function(){
this.xiaoming = this.grade + '年級' + this.classc + '班的小明';
this.zhangsan = this.grade + '年級' + this.classc + '班的張三';
this.lisi = this.grade + '年級' + this.classc + '班的李四';
}
}
}
</script>
個人理解:
computed:當街道、區縣、地市任意一項值改變時,我的地址就會跟着變化
watch:當班級或年紀改變時,小明張三李四的個人信息都會跟着變動。
通俗講:compute{}裏面任意一項變動,{}外面的就跟着變化。watch{}外面的變動,{}裏面的就跟變動。