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39 lines
929 B
39 lines
929 B
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>4.姓名案例_计算属性简写</title>
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<script type="text/javascript" src="../vue.js"></script>
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</head>
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<body>
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<div id="root">
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姓：<input type="text" v-model="firstName"> <br>
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名：<input type="text" v-model="lastName"> <br>
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姓名： <span>{{fullName}}</span>
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</div>
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<script type="text/javascript">
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const vm = new Vue({
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el: '#root',
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data: {
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firstName: "张",
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lastName: "三",
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fullName: "张-三"
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},
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watch: {
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firstName(newValue){
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setTimeout(()=>{
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this.fullName = newValue + '-' + this.lastName
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}, 1000)
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},
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lastName(newValue){
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this.fullName = this.firstName + '-' + newValue
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}
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}
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})
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console.log(vm)
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</script>
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</body>
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</html>
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