next/dist/esm/client/components/router-reducer/reducers/find-head-in-cache.js

The React Framework

import { createRouterCacheKey } from "../create-router-cache-key";
export function findHeadInCache(cache, parallelRoutes) {
    const isLastItem = Object.keys(parallelRoutes).length === 0;
    if (isLastItem) {
        return cache.head;
    }
    for(const key in parallelRoutes){
        const [segment, childParallelRoutes] = parallelRoutes[key];
        const childSegmentMap = cache.parallelRoutes.get(key);
        if (!childSegmentMap) {
            continue;
        }
        const cacheKey = createRouterCacheKey(segment);
        const cacheNode = childSegmentMap.get(cacheKey);
        if (!cacheNode) {
            continue;
        }
        const item = findHeadInCache(cacheNode, childParallelRoutes);
        if (item) {
            return item;
        }
    }
    return undefined;
}

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