$animate#enter logic does not totally make sense

[caitp]

      enter: function(element, parent, after, done) {
        if (after) {
          after.after(element);
        } else {
          if (!parent || !parent[0]) {
            /* caitp note: `after` is falsy here, what are we doing? */
            parent = after.parent();
          }
          /* caitp note: I feel like if `after` is null, the expected behaviour would be
             to prepend. I'm sure there's a precedent for this somewhere, but I
             can't seem to find it on MDN. But someone on IRC was asking about
             how to make $animate#enter() prepend rather than append. */
          parent.append(element);
        }
        done && $timeout(done, 0, false);
      },

note I did sort of post this before doing a proper investigation to see how broken this is, but I'll do a quick test and close this if I think the behaviour is acceptable.

Oh, the IRC user posted an issue re: this too, #6274. Anyways, taking a quick look

• http://plnkr.co/edit/qECZ0VMVLCMDugY9Usat?p=preview (quick example which demonstrates the TypeError)
• http://plnkr.co/edit/8gUgr5uqFhOV9nmquzQB?p=preview (quick example showing the sort of unexpected behaviour)

[matsko]

You created this issue twice. Closing this in favour of: #6275

[caitp]

I have no idea why my browser did that, but I guess I'll copy my comments into that one then