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[doc] add eslint rule references in react guide
* react/jsx-filename-extension * react/no-array-index-key
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@@ -80,7 +80,7 @@ This style guide is mostly based on the standards that are currently prevalent i
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## Naming
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- **Extensions**: Use `.jsx` extension for React components.
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- **Extensions**: Use `.jsx` extension for React components. eslint: [`react/jsx-filename-extension`](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-filename-extension.md)
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- **Filename**: Use PascalCase for filenames. E.g., `ReservationCard.jsx`.
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- **Reference Naming**: Use PascalCase for React components and camelCase for their instances. eslint: [`react/jsx-pascal-case`](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-pascal-case.md)
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@@ -351,7 +351,7 @@ This style guide is mostly based on the standards that are currently prevalent i
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<div />
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```
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- Avoid using an array index as `key` prop, prefer a stable ID.
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- Avoid using an array index as `key` prop, prefer a stable ID. eslint: [`react/no-array-index-key`](https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/no-array-index-key.md)
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> Why? Not using a stable ID [is an anti-pattern](https://medium.com/@robinpokorny/index-as-a-key-is-an-anti-pattern-e0349aece318) because it can negatively impact performance and cause issues with component state.
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