lovecoding
/
W0407


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <div>姓: <input type="text" v-model="firstName"></div>
        <div>名: <input type="text" v-model="lastName"></div>
        <div>
            <!-- 1.{{firstName + lastName}} -->
        </div>
        <div>
            2.{{getName()}}
        </div>
        <div>
            3.{{myName}}
        </div>
    </div>
    <script src="./vue.js"></script>
    <script>
        var app = new Vue({
            el:"#app",
            data:{
                firstName:"胡",
                lastName:"图图"
            },
            methods:{
                getName() {
                    console.log("1")
                    return this.firstName + this.lastName;
                }
            },
            computed:{
                myName:{
                    get() {
                        console.log('2')
                        return this.firstName + this.lastName
                    },
                    set() {
                        this.firstName = '懒';
                        this.lastName = '羊羊';
                    }
                },
                // xxx:{

                // }
            },
            watch:{
                firstName(newValue,oldValue) {
                    console.log(newValue,oldValue,'watch')
                },
                lastName:{
                    immediate: true, //立即监听
                    deep: true, //深度
                    handler(newValue,oldValue) {
                        console.log(newValue,oldValue,'深度')
                    }
                }
            }
        })
        // app.myName = ''
    </script>
</body>
</html>