React hooks

Hooks are basically used in functional components to introduce core

react functionality .. e.g useEffect can call a function once or on a value chang e

useEffect(()=>

{

}

,[what ever value you want to fire this effect on change]);

useState we can use component like state inside the functional components.

they are a life savers when you want to maintain state in functional components.. 

e.g const [ variable, function ]  = useState(null)

Now this will work like a normal state .function .. its awesome..

you can use useRef also to create references...