HTML／CSS

[HTML/CSS] Drag&Drop 구현해보기

teamnova 2022. 11. 24. 12:00
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웹에서 종종 Drag & Drop을 구현해야 할 경우가 있습니다.
HTML 과 CSS, JavaScript 로 구현해보겠습니다

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="style.css" />
    <title>Drag N Drop</title>
  </head>
  <body>
    <div class="empty">
      <div class="fill" draggable="true"></div>
    </div>
    <div class="empty"></div>
    <div class="empty"></div>
    <div class="empty"></div>
    <div class="empty"></div>

    <script src="script.js"></script>
  </body>
</html>
const fill = document.querySelector(".fill");
const empties = document.querySelectorAll(".empty");

fill.addEventListener("dragstart", dragStart);
fill.addEventListener("dragend", dragEnd);

for (const empty of empties) {
  empty.addEventListener("dragover", dragOver);
  empty.addEventListener("dragenter", dragEnter);
  empty.addEventListener("dragleave", dragLeave);
  empty.addEventListener("drop", dragDrop);
}

function dragStart() {
  this.className += " hold";
  setTimeout(() => (this.className = "invisible"), 0);
}

function dragEnd() {
  this.className = "fill";
}

function dragOver(e) {
  e.preventDefault();
}

function dragEnter(e) {
  e.preventDefault();
  this.className += " hovered";
}

function dragLeave() {
  this.className = "empty";
}

function dragDrop() {
  this.className = "empty";
  this.append(fill);
}
* {
  box-sizing: border-box;
}

body {
  background-color: steelblue;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  margin: 0;
}

.empty {
  height: 150px;
  width: 150px;
  margin: 10px;
  border: solid 3px black;
  background: white;
}

.fill {
  background-image: url('https://source.unsplash.com/random/150x150');
  height: 145px;
  width: 145px;
  cursor: pointer;
}

.hold {
  border: solid 5px #ccc;
}

.hovered {
  background-color: #333;
  border-color: white;
  border-style: dashed;
}

@media (max-width: 800px) {
  body {
    flex-direction: column;
  }
}