js原生拖放拼图游戏源码

以下是一个简单的 JavaScript 原生拖放拼图游戏的源码示例：

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>拖放拼图游戏</title>
  <style>
    #puzzle {
      display: grid;
      grid-template-columns: repeat(3, 100px);
      grid-gap: 5px;
    }

    .piece {
      width: 100px;
      height: 100px;
      background-color: #ccc;
      border: 1px solid #000;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
    }
  </style>
</head>

<body>
  <div id="puzzle">
    <div class="piece" draggable="true">1</div>
    <div class="piece" draggable="true">2</div>
    <div class="piece" draggable="true">3</div>
    <div class="piece" draggable="true">4</div>
    <div class="piece" draggable="true">5</div>
    <div class="piece" draggable="true">6</div>
    <div class="piece" draggable="true">7</div>
    <div class="piece" draggable="true">8</div>
    <div class="piece" draggable="true">9</div>
  </div>

  <script>
    const puzzle = document.getElementById('puzzle');
    const pieces = puzzle.querySelectorAll('.piece');

    let draggedPiece = null;

    pieces.forEach(piece => {
      piece.addEventListener('dragstart', e => {
        draggedPiece = piece;
        e.dataTransfer.effectAllowed = 'move';
      });

      piece.addEventListener('dragover', e => {
        e.preventDefault();
        e.dataTransfer.dropEffect = 'move';
      });

      piece.addEventListener('drop', e => {
        e.preventDefault();
        if (e.target.classList.contains('piece') && e.target !== draggedPiece) {
          const temp = e.target.textContent;
          e.target.textContent = draggedPiece.textContent;
          draggedPiece.textContent = temp;
        }
      });
    });
  </script>
</body>

</html>

基础概念：