Master React Patterns by Example

Explore stateless functional components and components with state and side effects using hooks, wiring a button to onClick, props, and a useEffect that logs count updates in a counter example.

Explore the controlled and uncontrolled pattern in React, contrasting state-managed inputs with onchange updates against DOM-managed inputs via refs. Learn how useState and refs create practical patterns for input management.

Separate concerns with the container presenter pattern by using a container to manage state and fetch data via useEffect, and a presenter to render the UI with the todo list.

Explore the render props pattern by building a data provider that passes data to a render function, showing a loading state and then data when available.

Explore the compound components pattern in React, where a parent manages the active tab state and shares it with child components via context, demonstrated with a tabs example.

Explore the higher-order components pattern in React by building a with-loading wrapper that wraps base components, adds a loading state and fetches data, and returns an enhanced component.

Explore how higher order components enhance code reuse and separation of concerns for authentication, data fetching, and error handling, while noting prop conflicts and wrapping complexity.

Explore using the async/await pattern inside a useEffect to fetch data, manage loading state, handle errors, and render results from state.

Learn to fetch data with the Fetch API in React by using useState and useEffect to manage data, loading state, and errors, then render the JSON response.

Abstract the async/await data fetch into a custom hook useFetch that takes a URL and returns data, loading, and error, with useEffect wired to the URL.

Build a React custom hook for data fetching with the fetch API, managing data, loading, and error states using useState and useEffect. Returns data, loading, and error to components.

Learn to make cleaner, feature rich http requests with Axios, comparing it to fetch, and implement data fetching in React using useEffect, loading states, and error handling.

Learn to fetch data with Axios using a custom hook that takes a URL, handles loading and errors, and shares data across components.

mastering react query simplifies data fetching with caching and synchronization; create a fetch function, use useQuery with a cache key, and wrap your app in a QueryClientProvider to enable caching.

Trigger conditional data fetching in React with a shouldFetch flag and a button click, fetching from a JSON placeholder users API and displaying the results.

Learn how to implement debouncing for a controlled search input in a React pattern by delaying API calls with setTimeout, enabling live suggestions via useEffect and state.

Learn a practical error handling pattern for React: fetch data with useEffect, throw on non-ok responses, catch errors, and display clear error messages and loading states.

Implement a loading state pattern in React by managing data and a loading flag with useEffect and fetch, showing a loading... indicator until data arrives.

Learn how to implement a polling pattern in React by fetching data from an API at five-second intervals with useEffect and useState, updating state, and cleaning up on unmount.

Master Redux patterns by showing how to fetch API data with Redux Thunk, create a data slice, configure the store, and connect components using dispatch and selectors.

Demonstrates a post request pattern in React by building a submit form with title, body, and userId, posting JSON to JSONPlaceholder posts via fetch, and handling the response.

Learn to fetch data in React with SWR, an alternative to React Query, by building a fetch data pattern using fetch, useSWR, and handling loading and errors.

Master the single column layout pattern in React to build simple, content-focused pages with a max width, centered container, and reusable children-based components.

Demonstrate a two-column layout by building a flex-based dashboard with a main content area and a sidebar using a three-to-one flex ratio, and swap sides to show its versatility.

Build a three-column layout in React using flex, with left navigation, main feed, and right trending topics, and style each column to visualize the pattern.

Create the holy grail layout with a header, left and right sidebars, a central main area, and a footer using CSS grid and responsive sizing.

Create a dynamic grid layout with CSS grid, using grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)) and a 16px gap; map items into bordered, padded cells for flexible dashboards, galleries, or product grids.

Create a stack layout component in React that arranges children vertically with an optional gap using flex direction column. Demonstrate stacking inputs and a button to form a sign-up form.

Explore a fixed header and footer layout that keeps persistent navigation bars visible while the main content scrolls, demonstrated with a chat-style interface and a reusable layout component.

Build a dashboard layout component using a flex container with a left sidebar at 250px and a flexible main content area, styled with a gray background and padding.

Create a masonry layout in React with the React Masonry CSS library, import the library, configure a four-column grid with breakpoints, and map items to render each tile.

Build a responsive layout with a CSS grid that adapts to multiple screen sizes using auto-fit columns, minmax(200px, 1fr), and a 16px gap, rendering flexible children.

Apply inline styles in React with the style attribute and a JSON object to set color and font size, a quick approach for small components with limited reusability.

Learn to style React components with CSS modules by creating a local, self-contained button component. Import button.module.css and apply styles via styles.button to avoid global conflicts.

Master styled components, a popular third-party pattern for scoped and dynamic styling via props, using styled.button and template literals. Note bundle size and server-side rendering (ssr) considerations.

Explore css-in-js styling in React using Emotion as a lightweight alternative to styled components, offering scope, dynamic styling, and theme management with SSR support, while noting debugging challenges and coupling.

Explore styling in React with css preprocessors like sass or less, using variables, nesting, mixins, and functions for reusable styles, while noting build tools and global scope considerations.

Learn theming in react using styled components theme provider to share colors and fonts, enable a design system and light and dark modes with centralized style management.

Apply the global styles pattern in a react app with styled components' createGlobalStyle, define styles in a template literal to set body margin and font family, then render app content.

Build a simple popup in React using plain JSX and vanilla CSS, control visibility with a boolean state, and style an overlay and a centered popup without libraries.

Learn how to build a modal with React Portal using ReactDOM.createPortal, keeping it on top, avoiding CSS conflicts, and letting the parent control is open and on close.

Enhance a React DOM modal by passing dynamic content via the children prop, closing on overlay click or the Escape key, and adding a useEffect hook with cleanup for accessibility.

Learn to enhance a modal popup's usability by closing on overlay click or escape key, then add a css fade-in and pop-in animation with keyframes.

Learn to manage local component state with useState and useReducer for simple UI states such as counters and form inputs. See how dispatch and a reducer handle increment and decrement actions.

Lift state up from child to parent to share data between siblings through prop drilling, with the parent holding count and the child updating it via setCount.

Master React patterns by example through using the React Context API to manage global state across components without prop drilling, illustrated with a light/dark theme context in a medium-sized app.

Compare controlled and uncontrolled forms in React by building two examples with useState and useRef, handling changes and submissions for name and email.

Post title and body data to json placeholder /posts asynchronously using fetch, with a controlled form that shows submitting state and disables the button during loading.

Explore the manual form validation pattern in React, implementing client-side email validation with immediate feedback on submit, and aligning with server-side checks to ensure data integrity.

Learn to refactor simple inline validation into a reusable React hook for form handling. Supply a caller-provided validate function and initial values to track changes, errors, and submissions.

Learn to build a three-step, validated multi-step form in React using a custom useMultiStepForm hook, with real-time and step submission validation and a mock API submit.

Centralize form state using the React context API by building a form provider and shared inputs that read and update state via useContext, enabling cross-form data sharing.

Discover how to implement a React error boundary with a fallback UI and reset capability to handle errors and allow a try again flow.

Learn to handle errors in React with a custom useErrorBoundary hook that uses the built-in error boundary, without libraries, featuring reset and retry using a fallback UI.