# Week of Year

URL: https://caijiao.org/dayjs/get-set/week
Source: docs/dayjs/get-set/week.md
Description: 获取或设置该年的第几周。这依赖 WeekOfYear 插件，才能正常运行

获取或设置该年的第几周。


```javascript
dayjs.extend(weekOfYear);

dayjs("2018-06-27").week(); // 26
dayjs("2018-06-27").week(5); // returns new dayjs object
```