【Vue.js学习】生命周期及数据绑定

var app = new Vue({
　　el:"#app",            
　　beforeCreate: function(){
　　　　console.log(‘1-beforeCreate 初始化之前‘);
　　　　//加载loading
　　},
　　created: function(){
　　　　console.log(‘2-created 创建完成‘);
   　　//关闭loading
   },
   beforeMount: function(){
      console.log(‘3-beforeMount 挂载之前‘);
   },
   mounted: function(){
      console.log(‘4-mounted 被挂载之后‘);
   },
   beforeUpdate: function(){
      console.log(‘5-beforeUpdate 数据更新前‘);
   },
   updated: function(){
      console.log(‘6-updated 被更新之后‘);
   },
   activated: function(){
      console.log(‘7-activated‘);
   },
   deactivated: function(){
      console.log(‘8-deactivated‘);
   },
   beforeDestroy: function(){
      console.log(‘9-beforeDestroy 被销毁之前‘);
   },
   destroyed: function(){
      console.log(‘10-destroyed 销毁之后‘);
   }
});

<div id="app">{{ Name }}</div>

//script
var app = new Vue({
    el:"#app",
    data: {
        Name : ‘小可爱‘
    }
});

<p v-bind:id="pId">永恒的绽放</p>
//缩写，冒号
<p :id="pId">永恒的绽放</p>

//script
var app = new Vue({
    el:"#app",
    data: {
        Name: "小可爱",
        pId: "wrn"
    }
});

{{ Num + 2 }}//成功
{{ Num < 5 ? ‘小于5‘ : ‘大于等于5‘}}//成功
{{ Name.split(‘‘).join(‘|‘) }}//成功
{{ var a = 2 }}//失败
{{ if(Num>2) { return ‘可怕‘ } }}//失败

//script
data: {
    Name: "小可爱",
    pId: "wrn",
    Num: 5
}

//一个过滤器
<p>{{ UserName | toUppercase }}</p>
//多个过滤器，将前一个过滤器的值传给下一个
<p>{{ UserName | toUppercase | addStr }}</p>
//多参数过滤器，默认参数为第一个值
<p>{{ UserName | manyPara(‘say‘, ‘hello‘) }}</p>

//script
filters: {  
    toUppercase: function (value) {  
        return value.toUpperCase();  
    },
    addStr: function (value) {  
        return value + " 老可爱了";   
    },
    manyPara: function (p1, p2, p3) {
        return p1+ ‘ ‘ + p2 + ‘ ‘ + p3;
    }
},

<button v-on:click="test(2, $event)">点击</button>
//缩写，@符
<button @click="test(2, $event)">点击</button>

//script
methods:{
    test: function(a, event){    
        console.log(a);
        console.log(event);
    },
} 

{{ eYa }}
{{ act }}

//script,可以直接当参数使用
computed:{
    eYa: function(){
        return this.Num + 5;
    },
    act: {
        get: function(){
            return this.Num;
        },
        set: function(newVaue){
             this.Num += newVaue;
             console.log(newVaue)
        }
    }
} ,

<input type="text" v-model="InpVal"/>
<p>input的值：<span>{{ InpVal }}</span></p>
<input type="radio" value="1" v-model="rdoVal"/>
<input type="radio" value="2" v-model="rdoVal"/>
<input type="radio" value="3" v-model="rdoVal"/>
<p>radio的值：<span>{{ rdoVal }}</span></p>
<input type="checkbox" value="stay" v-model="ckb1Val"/>
<p>单选checkbox的值：<span>{{ ckb1Val }}</span></p>
<input type="checkbox" value="stay" v-model="ckb2Val"/>
<input type="checkbox" value="with" v-model="ckb2Val"/>
<input type="checkbox" value="me" v-model="ckb2Val"/>
<p>复选checkbox的值：<span>{{ ckb2Val }}</span></p>
<select v-model="sel1Val">
    <option value="1">如果有天</option>
    <option value="2">我走了</option>
    <option value="3">你会像马达那样</option>
    <option value="4">找我么</option>
</select>
<p>单选select的值：<span>{{ sel1Val }}</span></p>
<select v-model="sel2Val" multiple>
    <option value="0">会一直找么</option>
    <option value="1">会一直找到死么</option>
</select>
<p>复选select的值：<span>{{ sel2Val }}</span></p>

var app = new Vue({
    el:"#app",
    data: {
        InpVal : "早已沉入冰冷的谷底",
        rdoVal : 2,
        ckb1Val : true,
        ckb2Val : ["stay", "me"],
        sel1Val : 3,
        sel2Val : [0, 1],
    }
});

<input type="text" v-model.lazy="User.Name"/>{{User.Name}}
<input type="text" v-model.number="User.Size"/>{{User.Size}}
<input type="text" v-model.trim="User.Tel"/>{{User.Tel}}

//script
data: {
    User:{
        Name: "老王",
        Size: "18",
        Tel: "110"
    }
}

<p :class="{‘ClassA‘: isA, ‘ClassB‘: !isA}">男孩抓紧领口</p>
<p class="ClassA" :class="BClass">有些感觉是说不出口</p>
<p :class="[‘AClass‘, ‘BClass‘]">有些烦恼让人抓破了头</p>

//页面
<p class="ClassB">男孩抓紧领口</p>
<p class="ClassA">有些感觉是说不出口</p>
<p class="AClass BClass">有些烦恼让人抓破了头</p>

//script
data: {
    isA: false,
    AClass: "ClassA",
    BClassb: "ClassB"
},

<p :style="StyleInfo">不要哭，这些年都过来了</p>
<p :style="{color: StyleInfo.color}">对不起，盲目的我</p>
<p :style="[StyleInfo, StylePlus]">没有心，只像闲人</p>

//页面
<p style="color: red; font-size: 16px;">不要哭，这些年都过来了</p>
<p style="color: red;">对不起，盲目的我</p>
<p style="color: red; font-size: 16px; border-bottom: 1px solid rgb(0, 0, 0);">没有心，只像闲人</p>

//script
data: {
    StyleInfo:{
        color: "red",
        fontSize: "16px",
    },
    StylePlus:{
        borderBottom: "1px solid #000"
    }
},