How can I use Javascript to enforce a 0.0 numeric format?

JavaScript
1

Hello,

I need to limit input in form field to be greater than 0 and less than one. As such, it can be either the integer 1 or a floating point. The business requirement calls for a format of 0.0

I’m new to actually ‘writing’ javascript and I’m not having much luck.

Any help would be appreciated.

I tried some regular expressions with an onkeypress event and I also tried just directly validating based on charcode and I thought I had it figured out and then I realized that I was able to type more than one period ‘.’ and now I find myself here (many hours later).

There has got to me a easier way to do this. Some sort of mask function or such?

If there is a JavaScript library that has a good mask function that I could use for this, that would work as well.

Best regards,
Kevin

2

Thanks, I will give it a try and see how it goes.

KR

3

Simpler to use numbers than regular expressions, and then convert the valid number to the string format you want.

function zeroToOne(field){
	var n= Number(field.value) || 0;
	return Math.max(0, (Math.min(1, n))).toFixed(1)
}

//test with dummy input

var inputfield={value: ‘.2’};

alert(zeroToOne(inputfield));