Javascript/PHP numberFormat not round

numberFormat.php

<?php 
//  numberFormat not round, PHP Version
//  https://stackoverflow.com/questions/3833137
   public static function numberFormatNoRound($number, $decimals = 2, $decPoint = '.', $thousandsSep = ',')
   {
      $negation = $number < 0 ? -1 : 1;
      $coefficient = pow(10, $decimals);
      $number = ($negation * floor((string) (abs($number) * $coefficient))) / $coefficient;
      return number_format($number, $decimals, $decPoint, $thousandsSep);
   }
?>

--------------------------------

// numberFormat not round, Javascript Version 
<script>

function numberFormatNoRound($number, $decimals = 0, $decPoint = '.' , $thousandsSep = ',')
{
  return number_format((Math.floor($number * 100) / 100).toFixed($decimals), $decimals, $decPoint, $thousandsSep );
}


//https://locutus.io/php/strings/number_format/
//https://www.cmdevhub.com/number_format/
function number_format(number, decimals, decPoint, thousandsSep) {
  if(decimals === 'undefined') decimals = 2;

  number = (number + '').replace(/[^0-9+\-Ee.]/g, '')
  const n = !isFinite(+number) ? 0 : +number
  const prec = !isFinite(+decimals) ? 0 : Math.abs(decimals)
  const sep = (typeof thousandsSep === 'undefined') ? ',' : thousandsSep
  const dec = (typeof decPoint === 'undefined') ? '.' : decPoint
  let s = ''
  const toFixedFix = function (n, prec) {
    if (('' + n).indexOf('e') === -1) {
      return +(Math.round(n + 'e+' + prec) + 'e-' + prec)
    } else {
      const arr = ('' + n).split('e')
      let sig = ''
      if (+arr[1] + prec > 0) {
        sig = '+'
      }
      return (+(Math.round(+arr[0] + 'e' + sig + (+arr[1] + prec)) + 'e-' + prec)).toFixed(prec)
    }
  }
  // @todo: for IE parseFloat(0.55).toFixed(0) = 0;
  s = (prec ? toFixedFix(n, prec).toString() : '' + Math.round(n)).split('.')
  if (s[0].length > 3) {
    s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep)
  }
  if ((s[1] || '').length < prec) {
    s[1] = s[1] || ''
    s[1] += new Array(prec - s[1].length + 1).join('0')
  }
  return s.join(dec)
}


console.log(numberFormat(3000.79));
</script>