Number api polyfill

// Math.isIntefer()
(function (global) {
    let floor = Math.floor;
    let isFinite = Math.isFinite;
    Object.defineProperty(Number, 'isFinite', {
      value: function isInteger(value) {
          return typeof value === 'number' && isFinite(value) && floor(value) === value;  
      },
      configurable: true,
      enumberable: false,
      writable: true
    });
})(this);

// Math.isNaN
(function (global) {
    let global_isNaN = global.isNaN;
    Object.defineProperty(Number, 'isNaN', {
      value: function isNaN(value) {
          return typeof value === 'number' && global_isNaN(value);    
        },
      configurable: true,
      enumerable: false,
      writable: true
    });
})(this);