Problems in the use of vue iview


<html>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">

<head>

<!-- import Vue.js -->
<script src="https://vuejs.org/js/vue.min.js"></script>
<!-- import stylesheet -->
<link rel="stylesheet" href="https://unpkg.com/iview/dist/styles/iview.css">
<!-- import iView -->
<script src="https://unpkg.com/iview/dist/iview.min.js"></script>
</head>
<body>
<!---->
<template>
    <!--:columns;:data-->
    <Table :columns="columns1" :data="data1"></Table>
</template>
<script>
    export default {
        data () {
            return {
            //Columns1titlekeyK-V
                columns1: [
                    {
                        title: "Name",
                        key: "name"
                    },
                    {
                        title: "Age",
                        key: "age"
                    },
                    {
                        title: "Address",
                        key: "address"
                    }
                ],
                //key
                data1: [
                    {
                        name: "John Brown",
                        age: 18,
                        address: "New York No. 1 Lake Park",
                        date: "2016-10-03"
                    },
                    {
                        name: "Jim Green",
                        age: 24,
                        address: "London No. 1 Lake Park",
                        date: "2016-10-01"
                    },
                    {
                        name: "Joe Black",
                        age: 30,
                        address: "Sydney No. 1 Lake Park",
                        date: "2016-10-02"
                    },
                    {
                        name: "Jon Snow",
                        age: 26,
                        address: "Ottawa No. 2 Lake Park",
                        date: "2016-10-04"
                    }
                ]
            }
        }
    }
</script>
</body>
</html>
export default keeps reporting exception: Unexpected token export, excuse me how to use vue? in my project structure Just came into contact with this