Where can I access official online Rails API docs for previous versions? -

now rails 5 released, http://api.rubyonrails.org/ has docs version 5.0.0. how can official docs rails 4.2 or other previous versions?

i aware of apidock.com/rails , others, want 4.2 docs api.rubyonrails.org.

you can find document right on here: http://api.rubyonrails.org/v4.2/

just replace 4.2 version need (keeping v) , of time you'll proper document.