How do search engines deal with AngularJS applications?

I see two issues with AngularJS application regarding search engines and SEO:

1) What happens with custom tags? Do search engines ignore the whole content within those tags? i.e. suppose I have

<custom><h1>Hey, this title is important</h1></custom>

would <h1> be indexed despite being inside custom tags?

2) Is there a way to avoid search engines of indexing {{}} binds literally? i.e.

<h2>{{title}}</h2>

I know I could do something like

<h2 ng-bind="title"></h2>

but what if I want to actually let the crawler "see" the title? Is server-side rendering the only solution?