<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<script src="vue.js"></script>
<title id="title">{{title}}</title>
</head>
<body>
<div id="ask"><!--vue不能控制body和html的标签-->
<ul>
<li v-for="(v,k) in list">
{{v.id}} ===== {{v.content}}<button v-on:click="remove(k)">删除</button>
</li>
</ul>
<textarea v-model="content" cols="30" rows="10"></textarea><br>
<button v-on:click="push('pre')">发表到前面</button>
<button v-on:click="push('end')">发表到后面</button>
<br>
<button v-on:click="del('first')">删除第一条</button>
<button v-on:click="del('last')">删除最后一条</button>
<br>
<button v-on:click="sort">排序</button>
<button v-on:click="reverse">反转</button>
</div>
<script>
var vue = function (options){new Vue(options)};
vue({
el:'#title',
data:{
title:'Vue 变异方法sort&reverse对评论进行排序'
}
});
var app = vue({
el:'#ask',
data:{
content:'',
list:[
{'id':3,'content':'hello'},
{'id':5,'content':'简单记录'},
{'id':2,'content':'个人博客'},
{'id':1,'content':'学习笔记'},
{'id':4,'content':'想学什么学什么 '}
]
},
methods:{
reverse(){
return this.list.reverse();
},
sort(){
this.list.sort(function (a,b) {
return a.id>b.id;
})
},
remove(k){
this.list.splice(k,1)
},
push(type){
var id = this.list.length+1;
var content_push = {id:id,'content':this.content};
switch (type) {
case 'pre':
this.list.unshift(content_push);
break;
case "end":
this.list.push(content_push);
break;
}
this.content='';
},
del(type){
switch (type) {
case 'first':
this.list.shift();
break;
case "last":
this.list.pop();
break;
}
}
}
});
</script>
</body>
</html>