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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.
A newer version of JavaScript is available. Why aren't you using that?
And "this is my first kata" is not an excuse.
Have you read the documentation on creating your first kata?
Duplicate.
No random tests.