There's no standards, but at this point I'd say Flux + React-router are quickly becoming it. react-router is made in the spirit of Ember's which is pretty well liked.
- Flux Architecture Pattern [0]
- React Router [1]
Note that there isn't really a prescribed model in Angular aside from $scope either.
I like react-router that looks quite nice. Flux looks like a description of an idea rather a JavaScript library. Is there a flux store that persists to a REST backend?
A model really isn't part of Angular core since it was split out but something like angular-resource is what I am talking about.
React would handle the DOM; you would have to have some data model that handles the autocomplete list/cursor position and then feeds the results back into the react component.
Flux might still be in the early adopter phase. Version 0.11 might be nice for side projects, but I'd feel uncomfortable trying to deploy a commercial app using a project that has been available to the public for less than 6 months.