How to change Background Color on Click Event in React JS?

To change the background color using the onClick event in JSX, in the react JS we use the onClick event in the JSX, and pass a function instead of String, the function we pass in onClick event use naming camelcase convention.

How to Push into a State Array in React using Spread Operator?

The spread operator takes out the existing elements of the array and creates a new array after adding values.

How to use useState Hook In ReactJS?

To use the useState hook you need to import it into the component. It accepts variables, call-back functions, and an array to update the states.