Rendering collections

Render a collection with map and provide a stable key for each item. Controlled fields receive their value from state and report changes through events.

React
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props · JSX

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Rendering collections

Render a collection with map and provide a stable key for each item. Controlled fields receive their value from state and report changes through events.

Start with a minimal example, observe the result, then change one thing at a time. This helps distinguish the intended rule from accidental behavior.

Key points

  • Choose explicit names.
  • Verify the result with a simple case.