HTML Input URL maxLength用法及代碼示例

HTML DOM中的DOM輸入URL maxLength屬性用於設置或返回URL輸入字段的maxlength屬性值。它指定URL字段中允許的最大字符數。輸入搜索maxLength屬性的默認值為524288。

用法:

它返回Input url maxLength屬性。
```
urlObject.maxLength
```
它用於設置Input url maxLength屬性。
```
urlObject.maxLength = number
```

屬性值：它包含一個單一的數字，用於指定搜索maxlength字段中允許的最大字符數。

返回值：它返回一個數字值，該值表示URL maxlength字段中允許的最大字符數。

示例1：本示例說明了如何返回Input URL maxLength屬性。

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        DOM Input URL maxLength Property 
    </title> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;">  
                GeeksForGeeks  
            </h1> 
  
        <h2> 
          DOM Input URL maxLength Property 
      </h2> 
  
        <label for="uname" 
               style="color:green"> 
            <b>Enter URL</b> 
      </label> 
  
            <input type="url"
                   id="gfg"
                   placeholder="Enter URL"
                   size="20"
                   pattern="https?://.+" 
                   title="Include http://" 
                   maxlength="20"> 
  
            <br> 
            <br> 
  
            <button type="button" 
                    onclick="geeks()"> 
                Click 
            </button> 
  
            <p id="GFG" 
               style="color:green; 
                      font-size:25px;"> 
          </p> 
  
            <script> 
                function geeks() {  
                     
                  var link =  
                     document.getElementById( 
                       "gfg").maxLength; 
                    
                    document.getElementById( 
                      "GFG").innerHTML = link; 
                } 
            </script> 
    </center> 
</body> 
  
</html>

輸出：
在單擊按鈕之前：

單擊按鈕後：

示例2：本示例說明了如何設置屬性。

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        DOM Input URL maxLength Property 
    </title> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;">  
                GeeksForGeeks  
            </h1> 
  
        <h2> 
          DOM Input URL maxLength Property 
      </h2> 
  
        <label for="uname" 
               style="color:green"> 
            <b>Enter URL</b> 
      </label> 
  
            <input type="url"
                   id="gfg" 
                   placeholder="Enter URL" 
                   size="20" 
                   pattern="https?://.+" 
                   title="Include http://"
                   maxlength="20"> 
  
            <br> 
            <br> 
  
            <button type="button" 
                    onclick="geeks()"> 
                Click 
            </button> 
  
            <p id="GFG" 
               style="color:green; 
                      font-size:25px;"> 
      </p> 
  
            <script> 
                function geeks() { 
                    
                     
                  var link =  
                      document.getElementById( 
                        "gfg").maxLength = "40"; 
                      
                  document.getElementById( 
                    "GFG").innerHTML =  
                    "The value of the maxLength"+ 
                    " attribute was changed to " + link; 
                } 
            </script> 
    </center> 
</body> 
  
</html>

輸出：
在單擊按鈕之前：

單擊按鈕後：

支持的瀏覽器：DOM輸入URL maxLength屬性支持的瀏覽器如下：

穀歌瀏覽器
Internet Explorer 10.0以上
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 Input URL maxLength 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。