HTML ColumnGroup span用法及代碼示例

HTML DOM中的ColumnGroup span屬性用於設置或返回colgroup元素的span屬性的值。 span屬性用於定義<colgroup>元素應跨越的列數。

用法:

它返回ColumnGroup span屬性。
```
columngroupObject.span
```
它用於設置ColumnGroup span屬性。
```
columngroupObject.span = number
```

屬性值：它包含單個值，該值指定應跨度的<colgroup>數。

返回值：它返回一個表示列數的字符串值。

範例1：本示例返回span屬性。

<!DOCTYPE html>  
<html>  
  
<head>  
    <title>  
        HTML DOM ColumnGroup span property  
    </title>  
  
    <style>  
        #myColGroup {  
            background:green;  
        }  
        table {  
            color:white;  
            margin-left:180px;  
            background:yellow;  
        }  
        #Geek_p {  
            color:green;  
            font-size:30px;  
        }  
        td {  
            padding:10px;  
        }  
    </style>  
</head>  
  
<body style="text-align:center;">  
  
    <h1 style="color:green;">  
            GeeksForGeeks  
        </h1>  
  
    <h2>HTML | DOM ColumnGroup span Property</h2> 
      
    <table>  
        <colgroup id="myColGroup" span="2"></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 to use ColumnGroup span Property -->
    <script>  
        function myGeeks() {  
            var x = document.getElementById("myColGroup").span;  
            document.getElementById("Geek_p").innerHTML = x;  
        }  
    </script>  
</body>  
  
</html>

輸出：
單擊按鈕之前：

單擊按鈕後：

範例2：本示例設置span屬性。

<!DOCTYPE html>  
<html>  
  
<head>  
    <title>  
        HTML | DOM ColumnGroup span property  
    </title>  
  
    <style>  
        #myColGroup {  
            background:green;  
        }  
        table {  
            color:white;  
            margin-left:180px;  
            background:yellow;  
        }  
        #Geek_p {  
            color:green;  
            font-size:30px;  
        }  
        td {  
            padding:10px;  
        }  
    </style>  
</head>  
  
<body style="text-align:center;">  
  
    <h1 style="color:green;">  
            GeeksForGeeks  
        </h1>  
  
    <h2>HTML | DOM ColumnGroup span Property</h2>  
      
    <table>  
        <colgroup id="myColGroup" span="2">  
        </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 to use DOM ColumnGroup span Property -->
    <script>  
        function myGeeks() {  
            var x = document.getElementById("myColGroup").span 
                    = "4";  
            document.getElementById("Geek_p").innerHTML 
                    = "The value of the span attribute was" 
                    + " changed to " + x;  
        }  
    </script>  
</body>  
  
</html>

輸出：
單擊按鈕之前：

單擊按鈕後：

支持的瀏覽器：DOM Colgroup span屬性支持的瀏覽器如下：

穀歌瀏覽器
IE瀏覽器
Firefox
Opera
Safari

相關用法

注：本文由純淨天空篩選整理自ManasChhabra2大神的英文原創作品 HTML | DOM ColumnGroup span Property。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。