<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>vue学习 语法demo1</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<div id="app">
<input type="text" v-model="txt" /><input type="button" value="添加" @click="addTag()">{{error}}
<ol v-for="(item,index) in arr">
<li @click="removeTag(index)">{{item.tag}}</li>
</ol>
</div>
<script src="vue.js" type="text/javascript"></script>
<script type="text/javascript">
var app = new Vue({
el: '#app',
data: {
txt:"",
arr:[],
error:""
},
watch:{
},
methods:{
addTag:function(){
if(this.in_array(this.txt,this.arr)){
this.error="标签已经存在！";
}else{
this.arr.push({"tag":this.txt});
}
},
removeTag:function(index){
this.arr.splice(index,1);
},
in_array:function(search,array){
for(var i in array){
if(array[i].tag==search){
return true;
}
}
return false;
}
}
});
</script>
</body>
</html>
