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I have created an annotation-based validation library called regula. There seems to be some amount of interest around the framework and the next thing I'd like to do is to support HTML5 validation. Originally I figured that I would check to see if the browser supported the HTML5 validation that has been specified and to either emulate or delegate to built-in regula equivalents. This is trivial for things like required, but once you start getting into the date-validation, it gets tricky (date widgets, localization, etc.). So I have a few options in front of me:

  • Full HTML5 Shim along with widgets (for date stuff etc.): I feel like this is overkill and essentially reinventing the wheel since this is already covered by things like modernizr.
  • Use HTML5 validation if available (either native, or provided by shim; otherwise ignore): What this means is that if HTML5 validation is available (natively or through a shim) I will use it, otherwise I will ignore it.

I'm leaning towards the latter since currently if someone wants to use HTML5 validation, they will most probably require a shim since not all browsers support HTML5.

Which option do you think is better?

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If lots of things are there with your custom validation, choose to use your won. But, things can be done in HTML5 validation as well. required is not only thing, use regular experessions for different type of expressions. –  Ashish Kumar Jan 10 at 12:49
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