dtPicker.js

const addHours = (d,h) => d.getTime() + (h * 3600000);
let start = new Date(addHours(new Date(), 1));
let finish = new Date(addHours(start, 8));

const handleHourChange = (startHour) => {
  start = new Date();
  start.setHours(startHour);
  finish = addHours(start, 8); 

  permittedHours();
}

const permittedHours = () => {
  let hour = start;
  let permitted = [];
  
  while (permitted.length < 8) {
    if (hour >= start && hour <= finish) permitted.push(hour.getHours());
    
    hour = new Date(addHours(hour, 1));
  }
  
  return permitted;
}

const datePicker = () => {
  $('.datetimepicker').datetimepicker({
    format: 'LT',
    locale: 'PT-BR',
    icons: {
      up: "fa fa-chevron-up",
      down: "fa fa-chevron-down",
      time: "far fa-clock",
    },
    enabledHours: permittedHours(),
    stepping: 15,
  })
}

export {datePicker};