![]() This technique technically does not validate. ![]() If you have an iOS device you can try out the demo which is depicted by figure 1 and figure 2. And displaying user friendly form validation on browsers like Firefox that have validation but no number input. Displaying the numeric spinner on browsers where it's implemented such as Chrome and Opera. ![]() This technique works in all browsers Displaying numeric keypads on iOS as well as Android and any other mobile device that's implemented type="number" or inputmode="numeric" handling. So I added min="0" to force browsers implementing type="number" from accepting negative numbers which other browsers would reject. The pattern * which is the only one that iOS will accept to trigger the keypad only permits the input of non-negative integral numbers. Pattern is ignored by most browsers that implement type="number" but is used by browsers that implement form validation but not the number input type such as Firefox. So a title was added which is the standard way to note what type of input is expected within the form field and causes that text to be used inside the error message to describe what the format is. Which in the case of browsers – like Firefox – which have implemented form validation but not type="number" results in the browser displaying a cryptic "Please match the requested format." message when the user attempts to submit the form and the number input contains some non-numeric characters. I also realized that the use of pattern triggers the browser's native form validation. inputmode="numeric" was added for forward compatibility as unlike pattern="*" is is the standard way to declare that a numeric mode of user input should be used for a form field. I found out that the technique of adding pattern="*" to an input to trigger the keypad in iOS works even when the input is type="number" so both type="number" and pattern are used. Wondering if this technique could be applied in a meaningful way to a number input without ruining the experience for users with other devices I started experimenting and came up with another technique. So while the trick nicely displays a numeric keypad on iOS the input no longer has the spinner interface on desktop browsers and other mobile devices such as Android no longer use their numeric keyboards. And the practice of depending on raw string matches to specific regexps in pattern="" to trigger UI changes is non-standard. The unfortunate issue with Chris' technique as-is is the number input is no longer a number input. For reference, other mobile OS such as Android already display their numeric keypad when focusing a number input.Ī html5doctor article article went over this, pointed out a trick by Chris Coyier using in which the pattern forces iOS to use it's numeric keypad, and also mentioned HTML5's inputmode. This isn't ideal as you don't need the alphabetic keys and iOS already has a full numeric keypad it could use for the input instead. By default iOS will display a standard keyboard slightly modified with a row of numbers at the top. However iOS' standard behavior for the number input isn't that ideal. Whether that means an up/down spinner or an optimized keyboard. ![]() Which if supported by a browser displays a form input optimized for inputting numbers. You probably already know about HTML 5's. ![]()
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