How to Only Allow Numbers in a Text Box using jQuery?

HTML Web Development Front End Technology

We can easily allow only numbers in a textbox using jQuery. Under the keyup() set the code for allowing only number values so that the textbox never accept strings. We will see two examples −

Allow Only Numbers in a TextBox using jQuery replace()
Allow Only Numbers in a TextBox using jQuery fromCharCode()

Allow Only Numbers in a TextBox using jQuery replace()

In this example, we will see how to allow only numbers in a TextBox using jQuery replace(). We must set the code under the keyup to allow only numbers while typing, else the textbox will not allow typing strings −

$('.numbers').keyup(function () {
   this.value = this.value.replace(/[^0-9\.]/g,'');
});

Above, we have set a Regex that only allows number 0-9 to be typed in the textbox. The .numbers is a class set for both the inputs i.e. −

<p>Rank:
   <input type="text" class="numbers" value="" />
</p>
<p>Marks:
   <input type="text" class="numbers" value="" />
</p>

Example

Let us now see the complete example to allow only numbers in a TextBox using jQuery replace() −


<!DOCTYPE html>
<html>
<title>Input Numbers Only</title>
<head>
   <script src="https://code.jquery.com/jquery-git.js"></script>
</head>
<body>
   <h1>Score</h1>
   <p>Rank:
      <input type="text" class="numbers" value="" />
   </p>
   <p>Marks:
      <input type="text" class="numbers" value="" />
   </p>
   <script>
      $('.numbers').keyup(function () {
         this.value = this.value.replace(/[^0-9\.]/g,'');
      });
   </script>
</body>
</html>

Output

The above textboxes only allow number input.

Allow Only Numbers in a TextBox using jQuery fromCharCode()

In this example, we will allow only numbers in a TextBox using jQuery fromCharCode(). We must set the code under the keypress to allow only numbers while typing, else the textbox will not allow typing strings −

$('.numbers').keypress(function (e) {
   if (String.fromCharCode(e.keyCode).match(/[^0-9]/g)) return false;
});

Above, we have set a Regex that only allows number 0-9 to be typed in the textbox. The .numbers is a class set for both the inputs i.e. −

<p>Rank:
   <input type="text" class="numbers" value="" />
</p>
<p>Marks:
   <input type="text" class="numbers" value="" />
</p>

Example

Let us now see the complete example to allow only numbers in a TextBox −


<!DOCTYPE html>
<html>
<title>Input Numbers Only</title>
<head>
   <script src="https://code.jquery.com/jquery-git.js"></script>
</head>
<body>
   <h1>Score</h1>
   <p>Rank:
      <input type="text" class="numbers" value="" />
   </p>
   <p>Marks:
      <input type="text" class="numbers" value="" />
   </p>
   <script>
      $('.numbers').keypress(function (e) {
         if (String.fromCharCode(e.keyCode).match(/[^0-9]/g)) return false;
      });
   </script>
</body>
</html>