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To check if a string is empty in React, access its length property and check if it is equal to 0, for example if (str.length === 0) {}. If the length of the string is equal to 0, the string is empty, otherwise it is not empty....

Use template literals to concatenate strings in React attributes, such as div className={border ${myClass}}. Template literals are delimited by backticks, allowing us to embed variables and expressions using the dollar sign and curly brace ${expressio...

To handle double click events in React: Add an `onClick` attribute to the element. Use the detail property of the event object to get the number of clicks. If the number of clicks is equal to 2, handle the double click event....

The forEach() method can be used to iterate over an array outside of JSX code in React. If we need to iterate over an array and render its elements directly in JSX code, use the map() method instead....

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....

Scroll to the bottom of a div in React: Add an element to the bottom of the div. Set a ref on the bottom element. When an event occurs, call the scrollIntoView() method of the ref object....

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....

Use the border css property to set the border style of elements in React, such as div style={{border: '1px solid rgba(0,255,0,0.3)'}}. If we only need to style a specific border, use the corresponding property, such as borderBottom....