[whatwg] [WebForms2] custom form validation notifications
joao.eiras at gmail.com
Sun Oct 8 20:17:29 PDT 2006
Matthew Paul Thomas <mpt at myrealbox.com> escreveu:
> On Oct 4, 2006, at 4:05 PM, Brad Fults wrote:
>> On 10/3/06, Joao Eiras <joao.eiras at gmail.com> wrote:
>>> If the user fills a form in an improper way the UA should alert him of
>>> the problems. Opera in the early days of its initial web forms support
>>> showed an alert box stating that the information was invalid, now it
>>> flashes the input field, and presents a message overlapped in the
>>> webpage. However it presents a very generic error message like "You
>>> must set a value!" (for required) or "foo is not in the format this
>>> page requires" (for pattern). The author may want, in the case of an
>>> error, to present its custom error message to the end user. This could
>>> be achieved by declaring new custom attribute for the several
>>> controls, which could hold the message. The UA could then either pop
>>> up that message to the user or embed it in the page (like Opera does
>>> currently). The attribute could be named like requirederr, patternerr,
>>> or use some other sort of naming convention to easily associate the
>>> constraining property with the message attribute.
> As UAs become more sophisticated, they can analyze the pattern attribute
> and present more context-sensitive error messages than any such
> attribute could. For example:
> * "410 is too much; this number must be 300 or less."
> * "178 is too small; this number must be 200 or more."
> * "This field must start with a letter."
> UAs can also localize these error messages much more extensively than
> any Web site could (which will be even more of a benefit when the Web
> site is not in your preferred language).
Of course. Such features are very useful, although such behaviours are
But that's not the point: my original message is related to
>> Is the use of the title attribute inappropriate for this case?
> It has the same lack of context.
More information about the whatwg