State Map Reactjs. A map is not the feature of React. The map is a JavaScript function that can be called on any array.
You can convert a function component like Clock to a class in five steps. With the map function we map every element of the array to the custom components in a single line of code. Our variable is called count but we could call it anything else like bananaThis is a way to preserve some values between the function calls useState is a new way to use the exact same capabilities that thisstate provides in a class.
State is like a data store to the ReactJS component.
If we have for example ten components that need data from the state we should create one container component that will keep the. One of the most used is the Google Maps API. Here data is stored in the form of pairs. ReactComponent is the base class for all class based ReactJS components.
