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next

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The React Framework

nextjs.org

vercel/next.js

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/** * Builds the inline bootstrap script content for the Instant Navigation Testing * API. It is embedded via React's `bootstrapScriptContent` into the prerendered * shell (and dynamic renders) so that it ends up in the cached static prelude * and runs before the client bootstrap module (app-index) reads * self.__next_instant_test as its hydration source. * * The script is cookie-guarded so it is inert unless the instant test cookie is * present (the prelude is shared across all requests). The fetch mirrors the * __NEXT_CLIENT_RESUME prefetch used for fallback routes; the instant test * cookie rides along on the same-origin request, so the server returns * static-only data, which doubles as the feature flag (truthy = instant mode). */ export declare function getInstantTestBootstrapScriptContent(): Promise<string>;