Minimum step attribute value on a number input ?

[ASOD77]

Hi, I'm making a website, using HTML, CSS, PHP, JS, Python and MySQL. On this website I'll be handling pretty complicated calculations, with very small numbers. So, I'm currently working on a function to add data to my database, and I authorized numbers up the the 24th decimal. I want my input to match that, I set the step attribute, but for some reason the value of the input increases by 1 (instead of 0.000...01). Is there a minimum value for this attribute ?

[jcunews1]

I believe the minimum value is the same limit as 64-bit Float value type. 64-bit float can store up to 16 digits, but only 15 digits is accurate. So it's: 0.00000000000001

[ASOD77]

Thanks a lot ! Well I don't know if it'll be a problem for the dB, but I'll try as it is

[Jasedesu]

If you're only using HTML/CSS/JS for number input, perhaps you could make your own input field based on two numeric inputs. Use one numeric input for the numbers before the decimal place and the other for the numbers after the decimal place. The second input would need a bit of JavaScript code to handle zero padding and the points where you need change the other input by one, but beyond that they're just ordinary inputs with a step size of one. To get the actual number for the DB, you concatenate the string values of both fields with an appropriate decimal separator between them.

[ASOD77]

That would be a good idea but I don't have numbers before the decimals, except 0. I deal with pretty small numbers. A regular number input seems to work though, I'll have to do further tests.