You will be using React components and Hooks in this tutorial, including theuseStateanduseEffectHooks. You can learn about components and Hooks in our tutorialsHow To Manage State with Hooks on React ComponentsandHow To Handle Async Data Loading, Lazy Loading, and Code Splitting with React. You ...
Fetching data from third-party RESTful APIs in React application is a common task when creating web application. This task can be solved easily by using the standard JavaScript Fetch API in your React application. The Fetch API is a new standard to make server requests with Promises, but which...
toHaveBeenCalledWith('https://api.example.com/users/example'); expect(result).toEqual(mockResponse); }); }); In this example, jest.mock() is used to mock the node-fetch module. Then, in the test, fetch.mockResolvedValueOnce() is used to create a mock answer for the fetch() call...
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 ...
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 R
Context APIand the React HookuseContext()in your React project. The Context API is a React structure that allows you to share specific data from all levels of your application and aids in solving prop-drilling. React Hooks are functions that serve as a modular replacement for state and lifecyc...
In this case, the OriginalComponent will be the React element, which will be wrapped. Then, we told React to render OriginalComponent to the UI. We will implement enhancement functionality later in this article. When that’s done, it’s time to use the UpdatedComponent function in our app...
In this way, in future access to the web application, the API will remember its state keeping all the activity that has been done over time. Setting up React app We create our application with the following command: npx create-react-app myApp After that, we create the following str...
Granted, this isn’t the best way to handle your data, but I hope it demonstrates whyprop drilling sucks. So how can the Context API in React.js help us avoid this? Introducing the Context Web Store Let’s refactor the app and demonstrate what it can do. In a few words, the Context...
If you’re not familiar with React Contexts, make sure to skim through React Context API: Using React Context with APIs effectively. Step 3: Access it within lower React Components Inside any component lower in the Component tree than your Provider, use the useSelector Hook to access state ...