使用React Loadable时遇到问题,而使用Webpack 3.11进行基于路由的代码拆分。
当我尝试在服务器上呈现我的应用程序时,我的异步模块会立即解析,而无需等待承诺。因此,SSR输出变为<div id="root"></div>
。
App.js:
const App = () => (
<Switch>
{routes.map((route, index) => (
<Route key={index} path={route.path} render={routeProps => {
const RouteComponent = route.component
return <RouteComponent {...routeProps} />
}} />
))}
</Switch>
)
我已经使用React Loadable定义了异步路由组件,如下所示:
Routes.js
function Loading ({ error }) {
if (error) {
return 'Oh nooess!'
} else {
return <h3>Loading...</h3>
}
}
const Article = Loadable({
loader: () => import(/* webpackChunkName: "Article" */ '../components/contentTypes/Article'),
loading: Loading
})
const Page = Loadable({
loader: () => import(/* webpackChunkName: "Page" */ '../components/contentTypes/Page'),
loading: Loading,
render (loaded, props) {
let Component = WithSettings(loaded.default)
return <Component {...props}/>
}
})
export default [
{
path: `/:projectSlug/:env${getEnvironments()}/article/:articleSlug`,
component: Article,
exact: true
},
{
path: `/:projectSlug/:env${getEnvironments()}/:menuSlug?/:pageSlug?`,
component: Page
}
]
WithSettings.js
export default (WrappedComponent: any) => {
class WithSettings extends React.Component<WithSettingsProps, WithSettingsState> {
static displayName = `WithSettings(${WrappedComponent.displayName || WrappedComponent.name || 'Component'})`
state = {
renderWidth: 1200
}
componentDidMount () {
this.loadSettings({ match: { params: { projectSlug: '', env: '' } } })
window.addEventListener('resize', this.onResize)
this.onResize()
}
componentWillUnmount () {
if (isClient) {
window.removeEventListener('resize', this.onResize)
}
}
componentDidUpdate (oldProps) {
this.loadSettings(oldProps)
}
onResize = () => {
this.setState({ renderWidth: this.getLayoutWidth() })
}
getLayoutWidth () {
return (document.body && document.body.offsetWidth) || 0
}
loadSettings (oldProps) {
const { settings, request, getNewSettings } = this.props
const { projectSlug: oldProjectSlug, env: oldEnv } = oldProps.match.params
const { projectSlug: newProjectSlug, env: newEnv } = this.props.match.params
if (
(
oldProjectSlug !== newProjectSlug ||
oldEnv !== newEnv
) ||
(
settings === undefined ||
(request.networkStatus === 'ready')
)
) {
getNewSettings()
}
}
render () {
const { settings, request, history, location, match } = this.props
const { renderWidth } = this.state
if (!settings || !request || request.networkStatus === 'loading') {
return <div />
}
if (request.networkStatus === 'failed') {
return <ErrorBlock {...getErrorMessages(match.params, 'settings')[4044]} fullscreen match={match} />
}
return (
<WrappedComponent
settings={settings}
settingsRequest={request}
history={history}
location={location}
match={match}
renderWidth={renderWidth}
/>
)
}
}
hoistNonReactStatic(WithSettings, WrappedComponent)
return connect(mapStateToProps, mapDispatchToProps)(WithSettings)
}
我设法将其范围缩小到用于包裹路线组件的WithSettings
HOC。如果我不使用WithSettings
HOC(与Article路线一样)然后我的SSR输出等待异步导入完成,并且服务器生成的html包含与路由相关的标记(好!)。如果我确实使用HOC(与Page路由一样),则该模块会立即解析,并且我的SSR输出变成<div id="root"></div
,因为它不再等待动态导入完成才渲染。问题是:我需要在所有路由中使用WithSettings HOC,因为它会从服务器上获取我需要渲染应用程序的数据。
谁能告诉我如何使用HOC 和将React Loadable的异步组件用于路由组件,以便它可以在服务器上工作?
答案 0 :(得分:0)
设法弄清楚了。
这是由于我的HOC。在render方法中,当<div />
或settings
的位置未定义或request
为request.networkStatus
时,它将返回loading
。事实证明,这跳了服务器端渲染。删除该块足以使其正常工作。