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vue實現一個簡單的篩選及排序

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>newproject</title>
    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/vue.js"></script>
  </head>
  <body>
    <div id="app">
    	<input type="text" v-model="searchName" />
    	<ul>
    		<li v-for="(item,index) in filterPerson" :key="index">
    			{{index}}--{{item.name}}--{{item.age}}
    		</li>
    	</ul>
    	<button @click="ageListChange(1)">按年齡升序排列</button>
    	<button @click="ageListChange(2)">按年齡降序排列</button>
    	<button @click="ageListChange(0)">按原來排列</button>
    </div>
    <script>
    	new Vue({
    		el: '#app',
    		data: {
    			searchName: '',
    			ageList: 0, //1-->升序,2-->降序
    			personList: [
    				{name: 'anna', age: 16},
    				{name: 'jack', age: 20},
    				{name: 'tom', age: 17},
    				{name: 'bobo', age: 18}
    			]
    		},
    		computed: {
    			filterPerson() {
    				const {searchName,personList,ageList} = this;
    				let fpList;
    				fpList = personList.filter(item => {
    					return item.name.indexOf(searchName)!==-1;
    				});
    				if(ageList!==0) {
    					fpList.sort(function(a1,a2){//正數,a1.age大,負數,a2.age大
    						if(ageList==1) {
    							return a1.age-a2.age;
    						}else{
    							return a2.age - a1.age;
    						}
    					});
    				}
    				return fpList;
    			}
    		},
    		methods: {
    			ageListChange(ageList) {
    				this.ageList = ageList;
    			}
    		}
    	});
    </script>
  </body>
</html>