What is a switching component?

A switching component is a component that renders one of many components. We need to use object to map prop values to components.

For example, a switching component to display different pages based on page prop:

import HomePage from './HomePage';
import AboutPage from './AboutPage';
import ServicesPage from './ServicesPage';
import ContactPage from './ContactPage';
const PAGES = {
home: HomePage,
about: AboutPage,
services: ServicesPage,
contact: ContactPage,
const Page = (props) => {
const Handler = PAGES[props.page] || ContactPage;
return <Handler {...props} />;
// The keys of the PAGES object can be used in the prop types to catch dev-time errors.
Page.propTypes = {
page: PropTypes.oneOf(Object.keys(PAGES)).isRequired,

January 11, 2022