HomeTagsEach child in a list should have a unique "key" prop.

Tag: Each child in a list should have a unique "key" prop.

Each child in a list should have a unique “key” prop.

How to Add, Modify, and Delete Items in a List in Python When re-rendering, React needs to identify which items have changed or been added to the list. Using keys helps React pinpoint these elements and reduces the amount of time spent iterating over the...