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Build-in React APIs

APIs that are useful for defining components.

  • createContext lets you define and provide context to the child components. Used with useContext.

  • forwardRef lets your component expose a DOM node as a ref to the parent. Used with useRef.

  • lazy lets you defer loading a component’s code until it’s rendered for the first time.

  • memo lets your component skip re-renders with same props. Used with useMemo and useCallback.

  • startTransition lets you mark a state update as non-urgent. Similar to useTransition.

createContext

forwardRef

lazy

memo

memo is a wrapper that will memoize the version of that component. This memoized version of your component will usually not be re-rendered when its parent component is re-rendered as long as its props have not changed. But React may still re-render it: memoization is a performance optimization, not a guarantee.

  • Component: The component that you want to memoize. The memo does not modify this component, but returns a new, memoized component instead.

TODO: Nije gotovo.

startTransition