useHover()

Question

It is common to see conditional rendering based on hover state of some element.

We can achive it by CSS pseduo class :hover, but for more complex cases it might be better to have state controlled by script.

Now you are asked to create a useHover() hook.

function App() {
  const [ref, isHovered] = useHover()
  return <div ref={ref}>{isHovered ? 'hovered' : 'not hovered'}</div>
}

Code

import { Ref } from 'react'

export function useHover<T extends HTMLElement>(): [Ref<T>, boolean] {
  // your code here
}

// if you want to try your code on the right panel
// remember to export App() component like below

// export function App() {
//   return <div>your app</div>
// }

Source

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