RFC: toggle-visibility

[jamesarosen]

Rendered

[mmun]

View is already has a ton of methods so this seems fine. We should aim to pull visibility out into a mixin a la @ebryn's recent spikes.

[jamesarosen]

Related Twitter thread: https://twitter.com/paul_irish/status/564577651609059329

Could be obviated by jquery/jquery#2057

[jamesarosen]

emberjs/ember.js#9634 has some more information, including some points on accessibility.

[jamesarosen]

I would prefer alternative 2, but I have two reservations:

1. is it OK for Ember to inject <style>[hidden] { display: none; }</style> into the page on boot? Is that likely to break apps? Could it at least inject it before any other <link> or <style> tags so it's easy to override with simple CSS?
2. are there apps or addons that rely on el.prop('style').display being "none" for hidden views? (As opposed to them just not being visible.)

[tomdale]

We are trying to pare down the number of built-in APIs that abstract DOM features. In favor of this, we'd recommend people use an {{#if}} or bind this attribute using the new syntax described in #60.