next/dist/shared/lib/segment-cache/vary-params-decoding.js

The React Framework

/**
 * Vary Params Decoding
 *
 * This module is shared between server and client.
 */ "use strict";
Object.defineProperty(exports, "__esModule", {
    value: true
});
Object.defineProperty(exports, "readVaryParams", {
    enumerable: true,
    get: function() {
        return readVaryParams;
    }
});
function readVaryParams(thenable) {
    // Attach a no-op listener to force Flight to synchronously resolve the
    // thenable. When a thenable arrives from the Flight stream, it may be in an
    // intermediate 'resolved_model' state (data received but not unwrapped).
    // Calling .then() triggers Flight to transition it to 'fulfilled', making
    // the value available synchronously. React uses this same optimization
    // internally to avoid unnecessary microtasks.
    thenable.then(noop);
    // If the thenable is still not 'fulfilled' after calling .then(), the server
    // failed to resolve it before the stream ended. Treat as unknown.
    if (thenable.status !== 'fulfilled') {
        return null;
    }
    return thenable.value;
}
const noop = ()=>{};

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