date/Calendar..html at master · swkor/date · GitHub

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<!DOCTYPE html>
<html lang="ko">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Calendar</title>
  <style>
/* 달력 */
.dateHead div {
  font-weight: bold;
  background: #441df1;
  color: #fff;
  text-align: center;
  border-radius: 20px;
}
.dateHead div:first-child,
.dateHead div:last-child {
  background: #f00f0f;
  color: #fff;
}
.grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  grid-gap: 5px;
}

.grid div {
  padding: 0.2rem;
  font-size: 2rem;
  cursor: pointer;
}

.dateBoard div {
  color: #000;
  font-size: 2.7rem;
  font-weight: bold;
  min-height: 4.5rem;
  text-align: center;
  padding: 0.1rem 0.1rem;
  border-radius: 0 0 20px 0;
  border: 1px solid #111;
}

.noColor {
  background: #ddd;
}

.header {
  display: flex;
  justify-content: space-between;
  padding: 1rem 3rem;
}

/* 좌우 버튼 */
.btn {
 display: block;
 width: 20px;
 height: 20px;
 border: 3px solid #000;
 border-width: 3px 3px 0 0;
 cursor: pointer;
}

.prevDay {
  transform: rotate(-135deg);
}

.nextDay {
  transform: rotate(45deg);
}

/* ---- */

* {
  margin: 0;
  padding: 0;
  list-style: none;
  box-sizing: border-box;
  font-family: Pretendard;
}

.rap {
  max-width: 820px;
  padding: 0 0.1rem;
  margin-top: 0.1rem;
}

.dateHead {
  margin: .2rem 0;
}
  </style>
</head>
<body>
  <div class='cale'></div>
  <script>
    class swCalendar {
      constructor(tagDay) {
        let tagDiv = document.querySelector(tagDay);
        tagDiv.innerHTML =`
<div class="header">
  <div class="btn prevDay"></div>
  <h2 class='dateTitle'></h2>
  <div class="btn nextDay"></div>
</div>
<div class="grid dateHead">
  <div>일</div>
  <div>월</div>
  <div>화</div>
  <div>수</div>
  <div>목</div>
  <div>금</div>
  <div>토</div>
</div>
<div class="grid dateBoard"></div>
`;
        let tagboard = tagDiv.querySelector('.dateBoard');
        let htmlDummy = '';
        for (let i = 0; i < 42; i++) {
          htmlDummy += `<div></div>`;
        }
        tagboard.innerHTML = htmlDummy;
        this.tagDay = tagboard.querySelectorAll(`div`);
        this.tagTitle = tagDiv.querySelector('.dateTitle');
        this.date = new Date();
        this.view(this.date);

        tagDiv.querySelector(`.prevDay`).onclick = () => {
          this.date = new Date(this.date.setMonth(this.month - 2));
          this.view(this.date);
        }
        tagDiv.querySelector(`.nextDay`).onclick = () => {
          this.date = new Date(this.date.setMonth(this.month));
          this.view(this.date);
        }
      }
      view(date) {
        const currentYear = this.date.getFullYear();
        const currentMonth = this.date.getMonth() + 1;
        const firstDay = new Date(this.date.setDate(1)).getDay();
        const lastDay = new Date(currentYear, currentMonth, 0).getDate();
        this.year = currentYear;
        this.month = currentMonth;
        this.firstDay = firstDay;
        this.tagTitle.innerText = `${currentYear}년 ${currentMonth}월`;
        for (let i = 0; i < firstDay; i++) {
          this.tagDay[i].innerHTML = '';
          this.tagDay[i].className = 'noColor';
        }
        for (let d = 1; d <= lastDay; d++) {
          let i = d + firstDay - 1;
          this.tagDay[i].innerHTML = d;
          this.tagDay[i].className = '';
        }
        for (let i = firstDay + lastDay; i < 42; i++) {
          this.tagDay[i].innerHTML = '';
          this.tagDay[i].className = 'noColor';
        }
      }
    }
    const calender2 = new swCalendar('.cale');
  </script>
</body>
</html>