Add Inputs in React with add button

Question

I\'m trying to make a set of inputs that can be duplicated or removed.

I\'ve found and used a combination of this : https://jsfiddle.net/69z2wepo/36745/ and this (becaus

Answer 1

The key that is passed in should be unique. You shouldn't have two items in the list with the same key value.

In your case, when you do 2 subsequent increment and decrement, you end up with same count value. That means same key repeated for different tag

console.log the count to check if its unique. The key 0 is used twice in the array, that's what the error means.