vue12 循環添加重復數據


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>智能社——http://www.zhinengshe.com</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <style>

    </style>
    <script src="vue.js"></script>
    <script>

    </script>
</head>
<body>
    <div id="box">
        <input type="button" value="添加" @click="add">
        <ul>
            <li v-for="val in arr">
                {{val}}
            </li>
        </ul>
    </div>
    <script>

        var vm=new Vue({
            data:{
                arr:['apple','pear','orange']
            },
            methods:{
                add:function(){//只能添加一次,有重復數據,
                    this.arr.push('tomato');
                }
            }
        }).$mount('#box');

    </script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>智能社——http://www.zhinengshe.com</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <style>

    </style>
    <script src="vue.js"></script>
    <script>

    </script>
</head>
<body>
    <div id="box">
        <input type="button" value="添加" @click="add">
        <ul>
            <li v-for="val in arr" track-by="$index"> <!-- 可以添加重復數據-->
                {{val}}
            </li>
        </ul>
    </div>
    <script>

        var vm=new Vue({
            data:{
                arr:['apple','pear','orange']
            },
            methods:{
                add:function(){
                    this.arr.push('tomato');
                }
            }
        }).$mount('#box');

    </script>
</body>
</html>

 


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