A toFixed method using bankers rounding

toFixedBankersRounding.js

// A toFixed method using bankers rounding
var toFixedBankers = function(value, precision) {
  // precision = checkPrecision(precision, lib.settings.number.precision);
  // value = unformat(value);
  
  var exponentialForm = Number(value + 'e' + precision);
  
  // i = integer part, f = fractional part
  var i = Math.floor(exponentialForm), f = exponentialForm - i;
  var rounded = f === 0.5 ? ((i % 2 == 0) ? i : i + 1) : Math.round(exponentialForm);
  var finalResult = Number(rounded + 'e-' + precision).toFixed(precision);
  return finalResult;
};