Explaination for useReducer hook #3
Open
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Update ReducerTutorial.js
useState is commonly used in conjunction with other hooks like useEffect to fetch data from an API and store it in the component's state.
additional information
Differences useLayoutEffect runs synchronously immediately after React has performed all DOM mutations. useEffect runs asynchronously after the browser has painted the updates.
Button is Child component
ImperativeHandle is Parent component
the use of React Context API for state management across components without prop drilling
Note that this component is overly complex and not practical for real-world use. It's designed solely to demonstrate the usage of all these hooks in one place. In a real application, you would typically use only the hooks necessary for your specific use case, and often in separate components or custom hooks.
…nitialized, rendered, and updated, including the specific actions taken by React at each stage. Provides a step-by-step explanation of how the React components are initialized, rendered, and updated, including the specific actions taken by React at each stage: Initial mounting of CallBackTutorial State initialization Creation of memoized callback Rendering of Child component Effect execution User interaction Re-rendering process
Memoization is widely used in React for performance optimization
updated explanation of the Operations sequence, focusing on clarifying how memoization applies to useCallback. This explanation emphasizes that useCallback memoizes the function reference itself, not the function's output. The key points highlighted in this updated explanation are: useCallback stores and reuses the entire function definition, not just its results. The memoization is based on the dependency array ([data] in this case). The benefit of this memoization is maintaining a stable function identity across re-renders, which helps prevent unnecessary re-renders of child components. This differs from traditional memoization, which typically caches function results based on input. This explanation should provide a clearer understanding of how useCallback implements memoization in the context of React components and reconciliation.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Changes illustrate the sequence of operations that occur when the button is clicked, highlighting how state changes are managed and how the component responds to user interactions.