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To toggle a class on click in React: Set an onClick attribute on the element. Store the active state in a state variable. Use a ternary operator to conditionally add a class....

To set a data attribute for an element in React, set the attribute directly on the element, such as or use the setAttribute() method, such as el.setAttribute('data-foo', 'bar'). We can access the element on the event object or...

Reverse an array in React: Create a shallow copy of the array using the spread syntax `(...)`. Call the `reverse()` method on the copy. Store the result in a variable....

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

Get the current year in React using the Date() constructor, for example, new Date().getFullYear(). The getFullYear() method will return a number corresponding to the current year....

To change the text of a button when clicked in React: Track the text of the button in a state variable. Set an onClick attribute on the button element. When the button is clicked, update the state variable....

To set the value of an input field using ref in React: Set the ref attribute on the input element. When an event is triggered, update the value of the ref. For example, ref.current.value = 'New value'....

To get the width and height of the window in React: Use the innerWidth and innerHeight properties of the window object. Add an event listener for the resize event in the useEffect hook. Save the changes in the window width and height in state variable...

Use the window.location.replace() method to redirect to an external url in React, for example, window.location.replace('https://www.jiyik.com'). We can programmatically replace the current resource with a new one by calling the replace() method if a c...

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') {}....