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

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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:

 <input type="number" name="price"
           pattern="[0-9]+([\.,][0-9]+)?" step="0.01"
            title="This should be a number with up to 2 decimal places.">

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:

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.

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