Let’s start with a simple example where we use a callback function to update the state based on the previous state. This is particularly useful when you want to increment a counter based on its current value. import React, { useState } from 'react'; const Counter = () => { const ...
2. Using Intersection Observer API The Intersection Observer API asynchronously observes the changes and loads images as the element enters the viewport. The prior approach required us to bind events, consider performance, and build a mechanism to determine if an element was in the viewport or not...
useMemo is a function provided by React, a popular JavaScript library for building user interfaces. It is used to optimize performance by memoizing the result of a computation and only recalculating it when necessary. When a component renders, any calculations or expensive operations inside it can ...
The Context API in React provides you with built-in functions and components to avoid prop-drilling in your component tree. The React HookuseContext()applies the same functionality in a streamlined, functional component body in one call. Check out theReact topic pagefor additional projects and res...
By using forwardRef, you can pass a reference from a parent component to a child component, even if that child component is wrapped inside another component. This enables the parent component to directly interact with the child’s DOM element or instance.How do refs work in React?
In this tutorial, Chidi Orji will show you how to build a React drag-and-drop component for file and image uploads. In the process, we’ll learn about the HTML drag-and-drop API. We will also learn how to use the useReducer hook for managing state in a React functional component. ...
Step 3: Use Fetch API to retrieve data Let’s return to the newly created React project and add the JavaScript code which is needed to retrieve data from the JSONPlaceholder REST endpoint. Open file src/App.js and change the default App component implementation to the following: ...
Too Long; Didn't ReadMigrating a React project from Javascript to TypeScript isn't a mere 'search-and-replace' of .js files with .tsx. It's a strategic move that involves learning new conventions, understanding types deeply, and, most importantly, changing the way we think about our code...
The new Context API in React solves one major problem–prop drilling. Even if you’re not familiar with the term, if you’ve worked on a React.js app, it has probably happened to you. Prop drilling is the processing of getting data from component A to component Z by passing it through...
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