Regular expression to restrict 'n' digits before and after decimal point

Question

I need a regex for restrict 10 digits before decimal and 2 digits after decimal point. i have tried with this

if (!(/^\d{1,10}(\.$|\.\d{1,2}$|$)/).test(value)) {
  event.preventDefault();
  event.stopPropagation();
}
<input id="input" type="number" />

It is working fine for input type text.But it is not working for type number.

Working Fiddle

Please help me on this

Answer 1

To restrict Decimal places before and after decimal this should work:

function ValidateDecimalInputs(e) {

    var beforeDecimal =3;
    var afterDecimal = 2;
   
    $('#'+e.id).on('input', function () {
        this.value = this.value
          .replace(/[^\d.]/g, '')            
          .replace(new RegExp("(^[\\d]{" + beforeDecimal + "})[\\d]", "g"), '$1') 
          .replace(/(\..*)\./g, '$1')         
          .replace(new RegExp("(\\.[\\d]{" + afterDecimal + "}).", "g"), '$1');   
    });
    }
 

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input type="text" id = "textBox" onclick="ValidateDecimalInputs(this)"/>

Answer 2

This should work.

if(! (/^[0-9]{10}\.[0-9]{2}$/).test(1234567890.12)) {
}

Just use this regex /^[0-9]{10}\.[0-9]{2}$/ in your code to verify if value is 10 digits before decimal and 2 after.