Using UMI plugin keep alive to store the keep alive state
1

$ npm install umi-plugin-keep-alive --save
//or
$ yarn add umi-plugin-keep-alive

2. Use

import { KeepAlive } from 'umi'
const contentList = () => {
	return (
		<>
			<KeepAlive 
				name="/About" //Can unload the <KeepAlive> node in the cached state by name
				saveScrollPosition="screen" //automatically saves the scroll position of the shared screen container
				when={true} > //true unloads when cached, false unloads when not cached
				<About/> //Component to save state for
			</KeepAlive>
		</>
	)
}

This function is based on react activation. For more details, please refer to react activation