How to handle floats and decimal separators with html5 input type number

Question

Im building web app which is mainly for mobile browsers. Im using input fields with number type, so (most) mobile browsers invokes only number keyboard for better user exper

Answer 1

I think what's missing in the answers above is the need to specify a different value for the step attribute, which has a default value of 1. If you want the input's validation algorithm to allow floating-point values, specify a step accordingly.

For example, I wanted dollar amounts, so I specified a step like this:

There's nothing wrong with using jQuery to retrieve the value, but you will find it useful to use the DOM API directly to get the elements's validity.valid property.

I had a similar issue with the decimal point, but the reason I realized there was an issue was because of the styling that Twitter Bootstrap adds to a number input with an invalid value.

Here's a fiddle demonstrating that the adding of the step attribute makes it work, and also testing whether the current value is valid:

• jsFiddle

TL;DR: Set the a step attribute to a floating-point value, because it defaults to 1.

NOTE: The comma doesn't validate for me, but I suspect that if I set my OS language/region settings to somewhere that uses a comma as the decimal separator, it would work. *note in note*: that was not the case for OS language/keyboard settings *German* in Ubuntu/Gnome 14.04.