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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
This cata is not about react but about how to satisfy babel. if some one having any problems with it, i suggest to copy your code to online babel repl and check errors there