How to use Keys with Components In React
Consider a situation where you have created a separate component for list items and you are extracting list items from that component. In that case, you will have to assign keys to the component you are returning from the iterator and not to the list items. That is you should assign keys to <Component /> and not to <li> A good practice to avoid mistakes is to keep in mind that anything you are returning from inside of the map() function is needed to be assigned a key.
ReactJS Keys
React JS keys are a way of providing a unique identity to each item while creating the React JS Lists so that React can identify the element to be processed.
Table of Content
- What is a key in React ?
- Assigning keys to the list
- Issue with index as keys
- Difference between keys and props in React
- Using Keys with Components
- Incorrect usage of keys
- Correct usage of keys
- Uniqueness of Keys
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