React's State Hook

Posted by Matt Etress on August 25, 2019

State is an important aspect of React, and as of 16.8, managing state within your React app is even easier with the use of React hooks.

Today we will take a brief look at the React.useState hook.

First, in order to use the state hook within our functional component we will need to import it:

import React, { useState } from 'react';

useState returns two values: the current state, and a function that can be used to update the state.

import React, { useState } from 'react';

const PeopleList = props => {
  const [people, setPeople] = useState([]);
}

In this example, we are calling useState and passing it the initial state of an empty array. useState returns the current state in a constant named people and can be updated with the function setPeople();

The fact that we are able to name our state constants anything we want and have multiple different states makes managing state very convenient.