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14 Aug
2022

Decimal validation in JavaScript

by Shubham Batra

862

So, for applying decimal only validation in js we will use onkeypress event of input boxes. So you can check the below code for applying the validation.

Below is a code in HTML and JavaScript to Number And Decimal validate a text field

<form>
    <div class="form-group row">
        <label for="inputPassword" class="col-sm-2 col-form-label">Enter Only Number And Decimal</label>
        <div class="col-sm-10">
            <input type="text" class="form-control" id="inputNumberWithDecimal" placeholder="Enter Only Number And Decimal" value="" name="inputNumberWithDecimal" onkeypress="return onlyNumberWithDecimal(event)" />
        </div>
    </div>
</form>

Here is how to validate the input only to accept Number And Decimal this will only take Number And Decimal values like "12.5"

<script>
    function onlyNumberWithDecimal(evt) {
        try {
            var charCode = (evt.which) ? evt.which : evt.keyCode;
            if (charCode != 46 && charCode > 31
                && (charCode < 48 || charCode > 57))
                return false;

            return true;
        }
        catch (err) {
            alert(err.Description);
        }
    }
   
</script>

You can copy complete code from here .

<form>
    <div class="form-group row">
        <label for="inputPassword" class="col-sm-2 col-form-label">Enter Only Number And Decimal</label>
        <div class="col-sm-10">
            <input type="text" class="form-control" id="inputNumberWithDecimal" placeholder="Enter Only Number And Decimal" value="" name="inputNumberWithDecimal" onkeypress="return onlyNumberWithDecimal(event)" />
        </div>
    </div>
</form>
<script>
    function onlyNumberWithDecimal(evt) {
        try {
            var charCode = (evt.which) ? evt.which : evt.keyCode;
            if (charCode != 46 && charCode > 31
                && (charCode < 48 || charCode > 57))
                return false;

            return true;
        }
        catch (err) {
            alert(err.Description);
        }
    }
   
</script>

So, this is how you can apply decimal only validation in javascript.

  • |
  • Number And Decimal validation javascript , Allow only Number And Decimal to be typed in a textbox , Number And Decimal validation in JavaScript

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