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| import React from 'react' | |
| import Loadable from './loadable.shared-runtime' | |
| const isServerSide = typeof window === 'undefined' | |
| type ComponentModule<P = {}> = { default: React.ComponentType<P> } | |
| export declare type LoaderComponent<P = {}> = Promise< | |
| React.ComponentType<P> | ComponentModule<P> | |
| > | |
| export declare type Loader<P = {}> = | |
| | (() => LoaderComponent<P>) | |
| | LoaderComponent<P> | |
| export type LoaderMap = { [module: string]: () => Loader<any> } | |
| export type LoadableGeneratedOptions = { | |
| webpack?(): any | |
| modules?(): LoaderMap | |
| } | |
| export type DynamicOptionsLoadingProps = { | |
| error?: Error | null | |
| isLoading?: boolean | |
| pastDelay?: boolean | |
| retry?: () => void | |
| timedOut?: boolean | |
| } | |
| // Normalize loader to return the module as form { default: Component } for `React.lazy`. | |
| // Also for backward compatible since next/dynamic allows to resolve a component directly with loader | |
| // Client component reference proxy need to be converted to a module. | |
| function convertModule<P>(mod: React.ComponentType<P> | ComponentModule<P>) { | |
| return { default: (mod as ComponentModule<P>)?.default || mod } | |
| } | |
| export type DynamicOptions<P = {}> = LoadableGeneratedOptions & { | |
| loading?: (loadingProps: DynamicOptionsLoadingProps) => React.ReactNode | |
| loader?: Loader<P> | LoaderMap | |
| loadableGenerated?: LoadableGeneratedOptions | |
| ssr?: boolean | |
| } | |
| export type LoadableOptions<P = {}> = DynamicOptions<P> | |
| export type LoadableFn<P = {}> = ( | |
| opts: LoadableOptions<P> | |
| ) => React.ComponentType<P> | |
| export type LoadableComponent<P = {}> = React.ComponentType<P> | |
| export function noSSR<P = {}>( | |
| LoadableInitializer: LoadableFn<P>, | |
| loadableOptions: DynamicOptions<P> | |
| ): React.ComponentType<P> { | |
| // Removing webpack and modules means react-loadable won't try preloading | |
| delete loadableOptions.webpack | |
| delete loadableOptions.modules | |
| // This check is necessary to prevent react-loadable from initializing on the server | |
| if (!isServerSide) { | |
| return LoadableInitializer(loadableOptions) | |
| } | |
| const Loading = loadableOptions.loading! | |
| // This will only be rendered on the server side | |
| return () => ( | |
| <Loading error={null} isLoading pastDelay={false} timedOut={false} /> | |
| ) | |
| } | |
| /** | |
| * This function lets you dynamically import a component. | |
| * It uses [React.lazy()](https://react.dev/reference/react/lazy) with [Suspense](https://react.dev/reference/react/Suspense) under the hood. | |
| * | |
| * Read more: [Next.js Docs: `next/dynamic`](https://nextjs.org/docs/app/building-your-application/optimizing/lazy-loading#nextdynamic) | |
| */ | |
| export default function dynamic<P = {}>( | |
| dynamicOptions: DynamicOptions<P> | Loader<P>, | |
| options?: DynamicOptions<P> | |
| ): React.ComponentType<P> { | |
| let loadableFn = Loadable as LoadableFn<P> | |
| let loadableOptions: LoadableOptions<P> = { | |
| // A loading component is not required, so we default it | |
| loading: ({ error, isLoading, pastDelay }) => { | |
| if (!pastDelay) return null | |
| if (process.env.NODE_ENV !== 'production') { | |
| if (isLoading) { | |
| return null | |
| } | |
| if (error) { | |
| return ( | |
| <p> | |
| {error.message} | |
| <br /> | |
| {error.stack} | |
| </p> | |
| ) | |
| } | |
| } | |
| return null | |
| }, | |
| } | |
| // Support for direct import(), eg: dynamic(import('../hello-world')) | |
| // Note that this is only kept for the edge case where someone is passing in a promise as first argument | |
| // The react-loadable babel plugin will turn dynamic(import('../hello-world')) into dynamic(() => import('../hello-world')) | |
| // To make sure we don't execute the import without rendering first | |
| if (dynamicOptions instanceof Promise) { | |
| loadableOptions.loader = () => dynamicOptions | |
| // Support for having import as a function, eg: dynamic(() => import('../hello-world')) | |
| } else if (typeof dynamicOptions === 'function') { | |
| loadableOptions.loader = dynamicOptions | |
| // Support for having first argument being options, eg: dynamic({loader: import('../hello-world')}) | |
| } else if (typeof dynamicOptions === 'object') { | |
| loadableOptions = { ...loadableOptions, ...dynamicOptions } | |
| } | |
| // Support for passing options, eg: dynamic(import('../hello-world'), {loading: () => <p>Loading something</p>}) | |
| loadableOptions = { ...loadableOptions, ...options } | |
| const loaderFn = loadableOptions.loader as () => LoaderComponent<P> | |
| const loader = () => | |
| loaderFn != null | |
| ? loaderFn().then(convertModule) | |
| : Promise.resolve(convertModule(() => null)) | |
| // coming from build/babel/plugins/react-loadable-plugin.js | |
| if (loadableOptions.loadableGenerated) { | |
| loadableOptions = { | |
| ...loadableOptions, | |
| ...loadableOptions.loadableGenerated, | |
| } | |
| delete loadableOptions.loadableGenerated | |
| } | |
| // support for disabling server side rendering, eg: dynamic(() => import('../hello-world'), {ssr: false}). | |
| if (typeof loadableOptions.ssr === 'boolean' && !loadableOptions.ssr) { | |
| delete loadableOptions.webpack | |
| delete loadableOptions.modules | |
| return noSSR(loadableFn, loadableOptions) | |
| } | |
| return loadableFn({ ...loadableOptions, loader: loader as Loader<P> }) | |
| } | |