缺少导入语句 插入"const item = require('@/plugins/timeline/src/item')"

好的，以下是添加了导入语句后的代码：

const item = require('@/plugins/timeline/src/item');

const data = [
  {
    title: '2021',
    items: [
      new item({
        title: 'Event 1',
        content: 'Description of Event 1',
        date: new Date(2021, 1, 1),
      }),
      new item({
        title: 'Event 2',
        content: 'Description of Event 2',
        date: new Date(2021, 4, 1),
      }),
      new item({
        title: 'Event 3',
        content: 'Description of Event 3',
        date: new Date(2021, 7, 1),
      }),
    ],
  },
  {
    title: '2020',
    items: [
      new item({
        title: 'Event 4',
        content: 'Description of Event 4',
        date: new Date(2020, 2, 1),
      }),
      new item({
        title: 'Event 5',
        content: 'Description of Event 5',
        date: new Date(2020, 5, 1),
      }),
    ],
  },
];

export default data;