React state

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.

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.

Syntax: We can use setState() to change the state of the component directly as well as through an arrow function . Example 1: Updating single attribute. We set up our initial state value inside constructor function and create another function updateState() for updating the state.24 Mar 2021

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).