ドットインストール - 3分動画でマスターできるプログラミング学習サービス

main.js

'use strict';

console.clear();

{
  const year = 2021;
  const month = 6; // 7月

  function getCalendarHead(){
      const dates = [];
      const d = new Date(year, month, 0).getDate();
      const n = new Date(year, month, 1).getDay();

      for(let i = 0; i < n; i++){
          dates.unshift({
              date: d - i,
              isToday: false,
              isDisabled: true,
          });
      }

      console.log(dates);
  }


  function getCalendarBody() {
    const dates = []; //date:日付, day:曜日
    const lastDate = new Date(year, month + 1, 0).getDate();

    for (let i = 1; i <= lastDate; i++) {
      dates.push({
        date: i,
        isToday: false,
        isDisabled: false,
      });
    }

    console.log(dates);
  }


  function getCalendarTail(){
      const dates = [];
      const lastDay = new Date(year, month + 1, 0).getDay();

      for(let i = 1; i < 7 - lastDay; i++){
          dates.push({
              date: i,
              isToday: false,
              isDisabled: true,
          });
      }

      console.log(dates);
  }

//   getCalendarHead();
//   getCalendarBody();
  getCalendarTail();
}