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Allow Only Numbers in a Text Box Using jQuery
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>
Output
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