React state management

The state allows React components to change their output over time in response to user actions, network responses, etc, without violating their rules . It can be initialized in the constructor of a React component and afterward, can be accessed via the React component’s class instance with the this object.

You can’t the way you have attempted but technically yes, you can have a function that returns the desired state you want initialised in your constructor.

You can’t the way you have attempted but technically yes, you can have a function that returns the desired state you want initialised in your constructor.

Changing the state Object To change a value in the state object, use the this. setState() method. When a value in the state object changes, the component will re-render, meaning that the output will change according to the new value(s).

To update our state, we use this. setState() and pass in an object . This object will get merged with the current state. When the state has been updated, our component re-renders automatically.

setState() allows you to change state in a React class component . To change the state of a function component, you use the useState() hook. Learn more about it here. setState() enqueues change to the component state and tell React that this component and its children need to be re-rendered with the updated state.