Learning React it can be pretty confusing since so much has been changing to be sure that a recommended approach, or an entire concept is still being used. Searching the official docs can be a pretty good way of sussing this out, but they aren't always complete and don't always provide alternatives (and I also presonally find them generally hard to read/understand)
A list of deprecated/out of style techniques/functions/concepts in React with alternate approaches and code samples.
##Submitting
Please submit pull requests with additions, ideas and corrections. I don't know enough about React to do this well. Also feel free to suggest changes to the format. The format should follow:
###Name Brief description of thing
//snippet of code example
Why it isn't commonly used anymore. relevant links everywhere!
Brief description of alternate Approach(es) to acheive similar effect
//code snippet of alternate
Any further discussion. ie: when it might still make sense to use.
#The Graveyard
##General
###Mixins
###React.createClass()