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@fluentui/react-context-selector

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@fluentui/react-context-selector

React useContextSelector hook in userland


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Weekly downloads
403K
decreased by-5.99%
Maintainers
12
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What is @fluentui/react-context-selector?

@fluentui/react-context-selector is a package that provides optimized context selectors for React. It allows you to create context providers and consumers with fine-grained updates, ensuring that only the components that need to re-render do so, improving performance in large applications.

What are @fluentui/react-context-selector's main functionalities?

Creating a Context

This feature allows you to create a new context using the `createContext` function provided by the package.

const MyContext = createContext(null);

Using a Context Provider

This feature allows you to create a context provider that supplies the context value to its children. The `useMemo` hook is used to memoize the context value to avoid unnecessary re-renders.

const MyProvider = ({ children }) => {
  const value = useMemo(() => ({ /* some value */ }), []);
  return <MyContext.Provider value={value}>{children}</MyContext.Provider>;
};

Consuming Context with Selector

This feature allows you to consume context values using the `useContextSelector` hook, which takes a context and a selector function. This ensures that the component only re-renders when the selected value changes.

const MyComponent = () => {
  const selectedValue = useContextSelector(MyContext, context => context.someValue);
  return <div>{selectedValue}</div>;
};

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Package last updated on 23 Sep 2024

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