Enter Only Decimal Numbers Using JavaScript Example

Updated on October 16, 2015     Kisan Patel

This post will show you how to restrict the user to allow only decimal numbers in input textbox using javascript.

script.js

function isDecimal(evt, ele) {
        evt = (evt) ? evt : window.event;
        var charCode = (evt.which) ? evt.which : evt.keyCode;
        console.log(charCode);
        if (charCode > 31 && (charCode != 46 || ele.value.indexOf('.') != -1) && (charCode < 48 || charCode > 57)) {
            return false;
        }
        return true;
}

index.html

Enter Number: <input type="text" class="groupOfTexbox" onkeypress = "return isDecimal(event, this)"/>

the output of the above example…

See the Pen avLgbB by Kisan (@pka246) on CodePen.