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如何限制HTML輸入框只接受數位輸入？

PHPz轉載: 2023-09-01 13:37:021400瀏覽

如何限制HTML輸入框只接受數位輸入？

在本文中，我們將學習如何限制HTML輸入框，使其只接受數位輸入。

We use the to limit an HTML input box so that it only accepts numeric inputs. By using this, we will get a numeric input field.

Syntax

以下是限制HTML輸入框只接受數字輸入的語法。

<input type="number">

Example

以下是一個範例程序，用於限制HTML輸入框只接受數字輸入 -

<!DOCTYPE html>
<html>
<center>
<head>
   <meta charset="UTF-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
   <style>
      input[type=number] {
         width: 10%;
         padding: 12px 20px;
         margin: 8px 0;
         box-sizing: border-box;
         border: 2px solid mediumseagreen;
         border-radius: 4px;
      }
   </style>
</head>
<body>
   <h1>Tutorialspoint</h1>
   <form action = "" method = "get">
      Enter your Mobile number -
      <input type="number"> <br><br>
      Enter your area Pincode -
      <input type="number"> <br><br>
      <input type="submit" value="Submit">
   </form>
</body>
</center>
</html>

如果我們嘗試輸入數字以外的任何值，它將不允許。因此，它嚴格只允許數字值。

Example

Following is another example program to limit an HTML input box so that it only accepts numeric input -

<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
   <form action = "" method = "get">
      Phone Number:
      <input type="number" name="num" min="1" max="20"><br>
      <input type="submit" value="Submit">
   </form>
</body>
</html>

After limiting the input box to number, if a user enters text and press submit button, then the following can be seen “Please enter a number.”

We can also limit the value of the number input field.

在將輸入框限制為數字後，如果使用者輸入的值大於限制值並點擊提交按鈕，那麼將會顯示以下內容：「值必須小於或等於指定的限制值（20）」

Example

Following is another example program to limit an HTML input box so that it only accepts numeric input -

<!DOCTYPE html>
<html>
<head>
   <meta charset="UTF-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
   <form action = "" method = "get">
      <h3>Select the quantity, and we cannot deliver more than 5.</h3><br>
      Pizza<input type="number" name="num" min="0" max="5"><br>
      Burger<input type="number" name="num" min="0" max="5"><br>
      Garlic Bread<input type="number" name="num" min="0" max="5"><br>
      Pepsi<input type="number" name="num" min="0" max="5"><br>
   </form>
</body>
</html>

如果您編譯並執行上述程式碼，它將顯示4個方框，您可以將限制設定為從最小值0到最大值5。

以上是如何限制HTML輸入框只接受數位輸入？的詳細內容。更多資訊請關注PHP中文網其他相關文章！

html if using number this input

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