HTMLTableColElement:span 属性

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

HTMLTableColElement 接口的 span 只读属性表示 <col><colgroup> 必须横跨的列数;这使得该列占据表中多列的空间。它反映 span 属性。

一个表示列数的正数。

备注: 设置新值时,该值将被限制为最接近的严格正数(最多 1000)。

示例

示例提供了两个按钮来修正主体第一个单元格的列跨度。

HTML

html
<table>
  <colgroup>
    <col />
    <col span="2" class="multiColumn" />
  </colgroup>
  <thead>
    <th></th>
    <th scope="col">C1</th>
    <th scope="col">C2</th>
    <th scope="col">C3</th>
    <th scope="col">C4</th>
  </thead>
  <tbody>
    <tr>
      <th scope="row">行 1</th>
      <td>cell</td>
      <td>cell</td>
      <td>cell</td>
      <td>cell</td>
    </tr>
  </tbody>
</table>
<button id="increase">增加列跨度</button>
<button id="decrease">减少列跨度</button>
<div>第一个 &lt;col&gt; 横跨 <output>2</output> 个实际列。</div>

CSS

css
.multiColumn {
  background-color: #d7d9f2;
}

JavaScript

js
// 获取相关接口元素
const col = document.querySelectorAll("col")[1];
const output = document.querySelectorAll("output")[0];

const increaseButton = document.getElementById("increase");
const decreaseButton = document.getElementById("decrease");

increaseButton.addEventListener("click", () => {
  col.span = col.span + 1;

  // 更新显示
  output.textContent = col.span;
});

decreaseButton.addEventListener("click", () => {
  col.span = col.span - 1;

  // 更新显示
  output.textContent = col.span;
});

结果

规范

Specification
HTML
# dom-colgroup-span

浏览器兼容性

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
span

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

参见