在Svelte中通过键列表对象创建表格，如{col1：[cell，cell]，col2：[cell，cell，cell]}

<script>
  let data = {
    col1: ['cell1', 'cell2'],
    col2: ['cell3', 'cell4', 'cell5']
  };
</script>

<table>
  {#each Object.keys(data) as col}
    <tr>
      {#each data[col] as cell}
        <td>{cell}</td>
      {/each}
    </tr>
  {/each}
</table>

<style>
  table {
    border-collapse: collapse;
    width: 100%;
  }
  th, td {
    border: 1px solid #ddd;
    padding: 8px;
  }
  th {
    background-color: #f2f2f2;
  }
</style>

<script>
  let data = {
    col1: ['cell1', 'cell2'],
    col2: ['cell3', 'cell4', 'cell5']
  };

  function addRow() {
    // 添加逻辑
  }

  function addColumn() {
    // 添加逻辑
  }
</script>