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Use the spread syntax ... to combine arrays in React, e.g. const arr3 = [...arr1, ...arr2]. The spread syntax is used to unpack the values ​​of two or more arrays into a new array. The same approach can be used to combine two or more arrays when s...

To handle onKeyDown events in React: Set the onKeyDown prop on the element. Use the key property of the event object to get the key the user pressed. For example, if(event.key === 'Enter') {}....

Use css file to change the color of links in React. We can define the styles that apply to the anchor element and import the css file in the component to make the styles take effect....

To draw a horizontal line in React: Use the hr/ tag and set the style attribute on it. Set the height of the line and optionally set the background color and colour....

To loop over an object in React: Use the Object.keys() method to get an array of the object's keys. Use the map() method to iterate over the array of keys....

React lazy function allows us to dynamically import components. We may want to do this to reduce the initial bundle size that the user must download to see the content on the screen....

Most developers are very familiar with how React hooks work and common use cases, but there is one issue with useEffect that many people may not be clear about....

This practical and straightforward article shows you how to properly update objects and arrays in the state in React. We'll use the useState hook and functional components....

To make an http request on click in React: Set an onClick attribute on the element. Every time the element is clicked, an HTTP request will be made. Update the state variables and render the data....

To fetch data on button click in React: Set the onClick attribute on the button element. Every time the button is clicked, an HTTP request is made. Update the state variable and render the data....

To scroll to an element on click in React: Set a ref attribute on the element you want to scroll to. Set an onClick attribute on another element. Every time the element is clicked, call the scrollIntoView() method of the ref object....

To get the height of an element in React: Set a ref attribute on the element. In the useLayoutEffect hook, update the state variable for the height. Use the clientHeight property to get the height of the element....

To conditionally set styles in React: Set the `style` property on an element. Use the ternary operator to conditionally set the value of a CSS property. For example, backgroundColor: count > 0 ? 'lime' : 'salmon'....

To set a global font family in React, you need to set the font-family style on the html element in your index.css file and then import the file into your index.js file. The global CSS should be imported in index.js to ensure it is loaded into your Rea...

Using conditions in `map()` in React: Call the map() method on an array. Use an if condition with an explicit return if satisfied. Otherwise return a different value or return null to render nothing....