The last code boxes in this page are blank:
http://cocos2d-x.org/docs/programmers-guide/actions/index.html
You’ working on JS?
As I noticed, it’s empty only for JS.
It’s easy to implement in both. Just check JS tests in case wondering how to do it or else use auto complete.
May be @slackmoehrle can fill it up. 
I am working on JS but it is slow going for me. I should be able to get back to it at a faster rate soon.
Feel free to submit PR’s to help with the content.