16 lines
781 B
TypeScript
16 lines
781 B
TypeScript
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/**
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* Runtime preamble — MUST stay the first import in server.ts.
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*
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* Next's app-render calls createAsyncLocalStorage(), which falls back to a
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* throwing FakeAsyncLocalStorage when `globalThis.AsyncLocalStorage` is unset
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* ("Invariant: AsyncLocalStorage accessed in runtime where it is not
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* available", error E504). next/dist/server/node-environment-baseline sets it
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* during Next's own standalone-server bootstrap, but our custom server
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* (dist/server.js → server-custom.js) can load app-render storage before that
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* runs. Set it up-front, idempotently, so the invariant can never fire.
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*/
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import { AsyncLocalStorage } from 'node:async_hooks';
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const g = globalThis as typeof globalThis & { AsyncLocalStorage?: unknown };
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g.AsyncLocalStorage ??= AsyncLocalStorage;
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