02-Vue 计算属性与监听器与VUE-cli使用-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_65251013/article/details/136416565

1.计算属性

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>计算属性</title>
    <script src="../js/vue.js"></script>
</head>
<body>
    <div id="root">
        姓：<input type="text" v-model="firstName"><br><br>
        名：<input type="text" v-model="lastName"><br><br>
        姓名：<span>{
  
  {fullName}}</span>
    </div>

    <script>
        Vue.config.productionTip = false 

        new Vue({
            el:'#root', 
            data:{ 
                firstName:'张',
                lastName:'三'
            },
            computed:{
                fullName:{
                    get(){
                        return this.firstName + '-' + this.lastName
                    },
                    set(value){
						const arr = value.split('-')
						this.firstName = arr[0]
						this.lastName = arr[1]
                    }
                }
            }
        })
    </script>
</body>
</html>

效果: