提示items未定义，请问怎么回事啊

Question

<template><div id="app"><!--<img src="./assets/logo.png">--><h1>{{title}}</h1><h2 v-text='title'></h2><p v-html='content'></p><ul><li v-bind:class='{finished:item.isFinished}' @click='toggleClick(item)' v-for='item in items'>{{item.label}}</li></ul><input v-model='newItem' v-on:keyup.enter='addNewItem'></div></template><script>// import Hello from './components/Hello'import Store from './components/store.js';// console.log(Store);export default {data() {return{title:'todo list',content:'todo content<span>!</span>',items:[],// liClass:'lxq'newItem:''}},watch:{items:{handler: function(items) {Store.save(items);},deep: true}},

Answer 1

data（）应该是data:的吧