1.propsData选项
<body>
<header></header>
<script type="text/javascript">
var header_a = Vue.extend({
template:`<p>{{message}}-{{a}}</p>`,
data:function(){
return{
message:'Hello,I am header.'
}
},
props:['a'],
});
//此处是标签 类名#header id则是.header
new header_a({propsData:{a:111}}).$mount('header');
</script>
</body>
2.computed选项
<body>
<div id="app">
<p>{{newPrice}}</p>
<ul>
<li v-for="news in reverNews">{{news.title}}-{{news.date}}</li>
</ul>
</div>
<script type="text/javascript">
var newsLists = [
{title:'战“疫”中 习近平始终牵挂困难群众',date:'2017/3/24'},
{title:'声音·记“疫” 致敬这场战疫的中坚力量',date:'2017/3/25'},
{title:'清明追思 家国永念丨那些应被铭记的战“疫”瞬间',date:'2017/3/26'},
{title:'前行是最好的纪念',date:'2017/3/27'},
];
var app = new Vue({
el:'#app',
data:{
price:100,
newsList:newsLists,
},
computed:{
newPrice:function(){
return this.price = '￥' + this.price + '元';
},
reverNews:function(){
return this.newsList.reverse();//倒排序
}
},
})
</script>
</body>
3.methods选项
<body>
<div id="app">
<p>{{count}}</p>
<button @click="add(3,$event)">add</button>
<!-- 构造器中调用methods方法 -->
<p><btn @click.native="add(5)"></btn></p>
</div>
<!-- 外部调用methods方法 -->
<button onclick="app.add(10)">外部ADD</button>
<script type="text/javascript">
var btn = {
template:`<button>组件ADD</button>`
}
var app = new Vue({
el:'#app',
data:{
count:1,
},
components:{
"btn":btn,
},
methods:{
add:function(num,event){
if(num != ''){
this.count += num;
}else{
this.count ++;
}
console.log(event);//event包括点击操作的详细信息列表
}
}
})
</script>
</body>
4.watch选项
<body>
<div id="app">
<p>今日温度：{{temperature}} 度</p>
<p>穿衣建议：{{cloth}}</p>
<p><button @click="add()">升温</button><button @click="less()">降温</button></p>
</div>
<script type="text/javascript">
var clothsArr = [
"T恤短袖","夹克长裙","羽绒服"
];
var app = new Vue({
el:'#app',
data:{
temperature:14,
cloth:'夹克长裙',
},
methods:{
add:function(){
this.temperature += 5;
},
less:function(){
this.temperature -= 5;
}
},
//watch写在构造器内部
//watch:{
// temperature:function(newVal,oldVal){
// if(newVal >= 26){
// this.cloth = clothsArr[0];
// }else if(newVal < 26 && newVal >0){
// this.cloth = clothsArr[1];
// }else{
// this.cloth = clothsArr[2];
// }
// }
//}
})
//watch写在构造器外部
app.$watch('temperature',function(newVal,oldVal){
if(newVal >= 26){
this.cloth = clothsArr[0];
}else if(newVal < 26 && newVal >0){
this.cloth = clothsArr[1];
}else{
this.cloth = clothsArr[2];
}
});
</script>
</body>
5.mixins混入
<body>
<h1>mixins option<h1>
<hr>
<div id="app">
<p>{{num}}</p>
<p><button @click="add()">增加1</button></p>
</div>
<script type="text/javascript">
var addConsole = {
updated:function(){
//生命周期
console.log('数据发生变化，变成了'+this.num);
}
};
Vue.mixin({
updated:function(){
console.log('我是全局的混入');//最先执行1
}
});
var app = new Vue({
el:'#app',
data:{
num:1,
},
methods:{
add:function(){
this.num ++;
}
},
updated:function(){
console.log('我是原生的updated');//后执行3
},
//混入的先执行2
mixins:[addConsole]
})
</script>
</body>
6.extends扩展
<body>
<div id="app">
<p>${num}</p>
<p><button @click="add()">增加1</button></p>
</div>
<script type="text/javascript">
var extendObj = {
updated:function(){
console.log('我是扩展的updated方法');
},
methods:{//方法名一样，只执行原生的方法。
add:function(){
console.log('我是扩展出来的的方法add');
this.num ++;
}
}
}
var app = new Vue({
el:'#app',
data:{
num:1,
},
methods:{
add:function(){
console.log('我是原生的方法add');
this.num ++;
}
},
updated:function(){
console.log('我是原生的updated');
},
extends:extendObj,//只能有1个扩展
delimiters:['${','}']//差值形式{{}}改成 ${}
})
</script>
</body>
