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Rendering nested arrays using map(): Use the map() method to iterate over the outer array. In each iteration, call the map() method of the nested array. Render the elements of the nested array....

To get the value of an input field in React: Declare a state variable that tracks the value of the input field. Add an onChange attribute to the input field. Use event.target.value to get the value of the input field and update the state variable....

To get the height and width of the parent in React: Set the ref attribute on the element. In the useEffect hook, update the state variables for height and width. Use the offsetHeight and offsetWidth properties to get the height and width of the elemen...

Use the useEffect hook to listen to state changes in React. We can add the state variable we want to track to the hook's dependencies array, and the logic in the useEffect hook will run every time the state variable changes....

To insert a style tag in a React component, wrap our css in a template string in a style tag. The expression between the curly braces will be evaluated and the style will be added....

When building a web application, sometimes we need to display some long text. In this case, a smart design is to display only part of the text and add a Show More button for users to expand the text when needed. When the text is expanded and fully dis...

To create a back button using React Router: Set the onClick property on the button to a function. Use the useNavigate() hook, e.g. const navigate = useNavigate();. Call the navigate() function, passing it -1 - navigate(-1)....

Toggle Boolean state in React: Use the useState hook to track the state of a boolean. Pass a function to the setState function returned by the hook. Toggle the boolean based on the current value, e.g. setIsLoading(current => !current)....

This concise article shows you how to upload multiple files in React with the help of Axios. It’s not a big job and can be done in a few simple steps (you’ll see the Javascript and TypeScript code snippets in step 3)....

To set an `onClick` listener on a div element in React: Set the `onClick` property on the div. Every time the div is clicked, the function we passed to the prop will be called. We can access the div via event.currentTarget....

To use a button as a link in React, wrap the button in a tag, or in a Link component if using react router. The button will be rendered instead of a link, and clicking it will cause the browser to navigate to the specified page....

To set an onClick listener on a link in React: Set the onClick property on the link. Every time the link is clicked, the function we passed to the props will be called....

Using map() method with index in React: Call map() method on array. The function passed to map() method will be called with element and index....

Use the useEffect hook to run react hooks when the component is unmounted. The function we return from the useEffect hook is called when the component is unmounted and can be used for cleanup purposes....

Use the useEffect hook to call a function only once in React. When the useEffect hook is passed an empty dependencies array, it runs only when the component mounts. This is the preferred approach when we have to fetch data when the component mounts....