JavaScript - Test for an integer

Question

I have a text field that allows a user to enter their age. I am trying to do some client-side validation on this field with JavaScript. I have server-side validation already

Answer 1

You may use isInteger() method of Number object

if ( (new Number(x)).isInteger() ) {
  // handle integer
}

This method works properly if x is undefined or null. But it has poor browser support for now