facebook/react — pull request #616 by davidhellsing (2013-11-26 17:08:08+00:00)
Title: Changed key from Math.random() to todo.cid

It doesn’t make much sense to generate a random key for each todo render, because it will re-draw all todo’s DOM nodes on each model change. I changed it to the unique identifier ``todo.cid`` already supplied by the backbone model.