web2py does this automatically for some fields (integer, float, decimal).
It prevents you from typing invalid chars and also validates serverside for
security. It very easy to add other types of client-size typing
restrictions by using the examples. For example for integer:
jQuery(document).on('keyup', 'input.integer', function () {
this.value = this.value.reverse().replace(/[^0-9\-]|\-(?=.)/g,
'').reverse();
});
On Sunday, 18 August 2013 17:00:28 UTC-5, wb wrote:
>
> Hello. I'm just starting to dig into web2py. One thing I really want
> is field input masks ala Visual Foxpro, to prevent users from entering
> invalid characters rather than validating afterwards and telling them
> they made a mistake.
>
> For example, if a user types alpha characters into a numeric-only field,
> they do not even appear. A field that is uppercase alpha would convert
> a lowercase "a" to "A" as the user types. VFP input masks could do
> complex things with combinations of wildcard and static characters, like
> "999-999-9999", where the 9 allows a numeric digit, but the dashes are
> automatically inserted in the string when the user reaches that point.
>
> Some searching did not find anything concrete. Is there a plugin or
> some other standard way of doing least basic input formatting as the
> user enters data in a field?
>
> Thanks!
>
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