// First of all, include dayjs
const dayjs = require('dayjs');
 
// Then, include dayjs-business-time-advanced
const dayjsBusinessTime = require('dayjs-business-time-advanced');
 
// Attach dayjs plugin
dayjs.extend(dayjsBusinessTime);
 
// Now you have all Business Time methods in dayjs

// First of all, include dayjs
import dayjs from 'dayjs';
 
// Then, include dayjs-business-time-advanced
import dayjsBusinessTime from 'dayjs-business-time-advanced';
 
// Attach dayjs plugin
dayjs.extend(dayjsBusinessTime);
 
// Now you have all Business Time methods in dayjs