Web Reference: React 18 Tutorial Episode 23 - Key PropWeb Dev Courses - https://www.johnsmilga.com/Entire Playlisthttps://www.youtube.com/watch?v=GcrNHMcL-WM&list=PLnHJACx3... Aug 7, 2025 · When rendering a list, you need to assign a unique key prop to each element in the list. This helps React identify which elements have changed, been added, or been removed. If you choose not to assign an explicit key to list items then React will default to using indexes as keys. Here is an in-depth explanation about why keys are necessary if you’re interested in learning more.
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