Learn React useState Hook in 7 minutes
In React, the useState hook is a built-in function that allows you to add state to functional components. Prior to the introduction of hooks, state management was primarily associated with class components. However, the useState hook brought state management capabilities to functional components, making them more powerful and versatile.
By using the useState hook, you can declare state variables and access their current values within your functional component. The hook returns an array with two elements: the current state value and a function to update that value. You can then use this updater function to modify the state as needed.
The useState hook is called within the body of a functional component, typically at the top level. You pass the initial value of the state variable as an argument to the hook when it's first declared. React will preserve the initial value and keep track of subsequent updates to the state.