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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....

To use the substring() method in React: Call the method on a string. Pass the start and end index as parameters to it. The method returns a new string containing only the specified portion of the original string....

To remove a key from a React state object: Use the useState hook to store the state object. Destructure the key and remaining properties of the object. Set the state to the remaining properties....

To clear the value of an input field in React: Store the value of the input in a state variable. When an event occurs, set the state variable to an empty string. For uncontrolled components, set the value of the ref to an empty string, e.g. ref.curren...

To add a class to the body element in React: Access the body element as document.body in a useEffect or event handler. Use the classList.add() method to add a class to the body tag. For example, document.body.classList.add('my-class'...

Get input values ​​on form submission in React: Store the value of the input field in a state variable. Set the onSubmit attribute on the form element. Access the value of the input field in our handleSubmit function....

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....