Question

Is there any way to customize javascript prompt box?

I want to make my prompt to accept only numeric input… (I want to bind the keyup event – to be specific)

Is it possible?

Answer 1

No you cannot, but you may want to research Javascript modal windows – they may be what you are looking for. Or you can do something like this:

do {
  number = parseInt(prompt('Please enter a number'))
}
while (isNaN(number))