What do I need to know when learning Javascript API?

Discussion created by steven.lzhou on Nov 9, 2010
Latest reply on Nov 9, 2010 by jfletcher
I had experience in Javascript. I am now using ArcGIS Javascript API to create web map for my boss.  It seems those language is not something I am familar with, such as function changeMap ().  Are those dojo or API? What should I learn before using API? Thanks a lot!