[React] Use CSS Transitions to Avoid a Flash of Loading State
Based on research at Facebook, we know that if a user sees a flash of loading state, they perceive the app as being slower. So let's improve the pending experience for users with faster connections using css transitions to avoid showing the loading state right away.
import React from 'react' import fetchPokemon from '../fetch-pokemon' import { ErrorBoundary, createResource, PokemonInfoFallback, PokemonForm, PokemonDataView, } from '../utils' function PokemonInfo({pokemonResource}) { const pokemon = pokemonResource.read() return ( <div> <div className="pokemon-info__img-wrapper"> <img src={pokemon.image} alt={pokemon.name} /> </div> <PokemonDataView pokemon={pokemon} /> </div> ) } const SUSPENSE_CONFIG = {timeoutMs: 4000} function createPokemonResource(pokemonName) { return createResource(() => fetchPokemon(pokemonName)) } function App() { const [pokemonName, setPokemonName] = React.useState('') const [startTransition, isPending] = React.useTransition(SUSPENSE_CONFIG) const [pokemonResource, setPokemonResource] = React.useState(null) function handleSubmit(newPokemonName) { setPokemonName(newPokemonName) startTransition(() => { setPokemonResource(createPokemonResource(newPokemonName)) }) } return ( <div> <PokemonForm onSubmit={handleSubmit} /> <hr /> <div className={`pokemon-info ${isPending ? 'pokemon-loading' : ''}`}> {pokemonResource ? ( <ErrorBoundary> <React.Suspense fallback={<PokemonInfoFallback name={pokemonName} />} > <PokemonInfo pokemonResource={pokemonResource} /> </React.Suspense> </ErrorBoundary> ) : ( 'Submit a pokemon' )} </div> </div> ) } export default App
.pokemon-info.pokemon-loading { opacity: 0.6; transition: opacity 0s; /* note: the transition delay is the same as the busyDelayMs config */ transition-delay: 0.4s; }
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】凌霞软件回馈社区,博客园 & 1Panel & Halo 联合会员上线
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】博客园社区专享云产品让利特惠,阿里云新客6.5折上折
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步