How do search engines deal with AngularJS applications?

Question

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 tho

Answer 1

Google's Crawlable Ajax Spec, as referenced in the other answers here, is basically the answer.

If you're interested in how other search engines and social bots deal with the same issues I wrote up the state of art here: http://blog.ajaxsnapshots.com/2013/11/googles-crawlable-ajax-specification.html

I work for a https://ajaxsnapshots.com, a company that implements the Crawlable Ajax Spec as a service - the information in that report is based on observations from our logs.