32 lines
1.3 KiB
JavaScript
32 lines
1.3 KiB
JavaScript
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/**
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* Vary Params Decoding
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*
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* This module is shared between server and client.
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*/ /**
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* Synchronously reads vary params from a thenable.
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*
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* By the time this is called (client-side or in collectSegmentData), the
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* thenable should already be fulfilled because the Flight stream has been
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* fully received. We check the status synchronously to avoid unnecessary
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* microtasks.
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*
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* Returns null if the thenable is still pending (which shouldn't happen in
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* normal operation - it indicates the server failed to track vary params).
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*/ export function readVaryParams(thenable) {
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// Attach a no-op listener to force Flight to synchronously resolve the
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// thenable. When a thenable arrives from the Flight stream, it may be in an
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// intermediate 'resolved_model' state (data received but not unwrapped).
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// Calling .then() triggers Flight to transition it to 'fulfilled', making
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// the value available synchronously. React uses this same optimization
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// internally to avoid unnecessary microtasks.
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thenable.then(noop);
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// If the thenable is still not 'fulfilled' after calling .then(), the server
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// failed to resolve it before the stream ended. Treat as unknown.
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if (thenable.status !== 'fulfilled') {
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return null;
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}
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return thenable.value;
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}
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const noop = ()=>{};
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//# sourceMappingURL=vary-params-decoding.js.map
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