Edit

weekOfYear

WeekOfYear adds .week() API to returns a number indicating the Dayjs's week of the year.

var weekOfYear = require("dayjs/plugin/weekOfYear");
// import weekOfYear from 'dayjs/plugin/weekOfYear' // ES 2015

dayjs.extend(weekOfYear);

dayjs("2018-06-27").week(); // 26
dayjs("2018-06-27").week(5); // set week