Question

switching 组件是渲染多个组件之一的组件。我们需要使用对象将 prop 映射到组件中。

例如，以下的 switching 组件将基于 page 属性显示不同的页面：

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
}