React JS, which was created by Facebook, is today's most popular JavaScript Library for building User Interfaces. We can use React to build sleek, ...
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Great post. I feel like it is so easy to give the index of an item as the key for a list that many people do it just to get the error to go away in their console. I see lots of tutorials suggest this too since they aren’t covering the
keyproperty specifically. But, this could be a serious performance issue in a big application. I really like this article on thekeyprop by Kent C. Dodd. It goes over similar issues to what you’ve shown here.Definitely something that I probably overlooked in the past. Thanks for the heads up!
Is that really necessary? Thought it only has to be unique within the array you're rendering?