HTML Column span用法及代码示例

DOM列span属性用于设置或返回<column>元素的span属性的值。 HTML中的colspan属性指定单元格应跨越的列数。

用法:

它用于返回span属性。
```
columnObject.span
```
它用于设置formMethod属性。
```
columnObject.span = number
```

属性值：

number:它指定单元格应跨越的列号。它不允许负值。

返回值：它返回一个表示列数的数值。

示例1：本示例说明如何返回列span属性。

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML | DOM Column span Property 
    </title> 
</head> 
<style> 
    #myCol { 
        background:green; 
    } 
      
    table { 
        color:white; 
        margin-left:150px; 
    } 
      
    #Geek_p { 
        color:green; 
        font-size:30px; 
    } 
      
    td { 
        padding:10px; 
    } 
</style> 
  
<body style="text-align:center;"> 
  
    <h1 style="color:green;">  
            GeeksForGeeks  
        </h1> 
  
    <h2>HTML | DOM Column span Property</h2> 
    <table> 
        <colgroup> 
          <col id="myCol" span="2"> 
            <col style="background-color:green"> 
        </colgroup> 
        <tr> 
            <th>S.No</th> 
            <th>Title</th> 
            <th>Geek_id</th> 
        </tr> 
        <tr> 
            <td>Geek_1</td> 
            <td>GeekForGeeks</td> 
            <th>Geek_id_1</th> 
        </tr> 
        <tr> 
            <td>Geek_2</td> 
            <td>GeeksForGeeks</td> 
            <th>Geek_id_2</th> 
        </tr> 
    </table> 
    <br> 
    <button onclick="myGeeks()"> 
        Click 
    </button> 
    <h4>  
            <p id="Geek_p"
               style="color:green"> 
      </p>  
        </h4> 
    <script> 
        function myGeeks() { 
            // access col element  
            var x = document.getElementById( 
                "myCol").span; 
            document.getElementById( 
                "Geek_p").innerHTML = x; 
        } 
    </script> 
</body> 
  
</html>

输出：

在单击按钮之前：

单击“进入”按钮后：

示例2：此HTML示例说明了如何设置列跨度属性。

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        HTML | DOM Column span Property 
    </title> 
</head> 
<style> 
    #gfg { 
        background:green; 
    } 
      
    table { 
        color:white; 
        margin-left:150px; 
    } 
      
    #Geek_p { 
        color:green; 
        font-size:30px; 
    } 
      
    td { 
        padding:10px; 
    } 
</style> 
  
<body style="text-align:center;"> 
  
    <h1 style="color:green;">  
            GeeksForGeeks  
        </h1> 
  
    <h2>HTML | DOM Column span Property</h2> 
    <table> 
        <colgroup> 
          <col id="gfg" span="3"> 
            <col style= 
               "background-color:green"> 
        </colgroup> 
        <tr> 
            <th>S.No</th> 
            <th>Title</th> 
            <th>Geek_id</th> 
        </tr> 
        <tr> 
            <td>Geek_1</td> 
            <td>GeekForGeeks</td> 
            <th>Geek_id_1</th> 
        </tr> 
        <tr> 
            <td>Geek_2</td> 
            <td>GeeksForGeeks</td> 
            <th>Geek_id_2</th> 
        </tr> 
    </table> 
    <br> 
    <button onclick="myGeeks()"> 
        Click 
    </button> 
    <h4>  
            <p id="Geek_p" 
               style="color:green"> 
      </p>  
        </h4> 
    <script> 
        function myGeeks() { 
            // access col element  
            document.getElementById( 
                "gfg").span = 2; 
            document.getElementById("gfg"). 
            style.backgroundColor = "red"; 
  
        } 
    </script> 
</body> 
  
</html>

输出：
在单击按钮之前：

单击按钮后：

支持的浏览器：下面列出了DOM Column span属性支持的浏览器：

谷歌浏览器
IE浏览器
Firefox
Opera
Safari

相关用法

注：本文由纯净天空筛选整理自ManasChhabra2大神的英文原创作品 HTML | DOM Column span Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。