Then just to the right of the title there's a ⇒ character - click on that and you go to the implementation on GitHub.
Note that if something isn't in a build, it's probably not in there for a reason. Specifically Graphics isn't in the ESP8266 build because of RAM constraints (ESP8266 tends to use RAM for stuff that would have fitted in Flash on most other devices) - so you may find it nontrivial to add.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
If you find what you want in the Reference: http://www.espruino.com/Reference
Then just to the right of the title there's a
⇒
character - click on that and you go to the implementation on GitHub.Note that if something isn't in a build, it's probably not in there for a reason. Specifically Graphics isn't in the ESP8266 build because of RAM constraints (ESP8266 tends to use RAM for stuff that would have fitted in Flash on most other devices) - so you may find it nontrivial to add.