ng-messages: provide the input-element attributes to be used inside of the ng-message template

[johannesjo]

Would nice to be able to to something like this:

<div ng-message="minlength">Your input should be at least {{attrs.minlength}} characters long</div>

Or even more sophisticated:

<div ng-message="max"
        ng-if="attrs.type='date'">'The date provided should be no later than the {{attrs.max  |date}}</div>

If interested, I could try to provide a pull-request.

[caitp]

It's a cute idea, but I don't think we can really make this work well/generically. You're welcome to have a go at it, but I don't think it's something we want to do.

A more workable solution is really just to put the variables you need to use in scope, and read them directly from there.

[johannesjo]

@caitp Thank you for being honest. Than I can save myself the trouble.

It should be possible to do this when creating new scope programatically for the directive like it is done here (starting on line 33): https://github.com/johannesjo/ng-fab-form/blob/feature/html-templates/src/ng-fab-form-directive-f.js

But you're right: It feels a little hacky...

[Narretz]

Dupe of #9849 (although there are currently not tangible plans for that)