Function bfs

javascript/0133-clone-graph.js:52–62

(queue, seen)

};

const bfs = (queue, seen) => {
    while (!queue.isEmpty()) {
        /* Time O(V + E) */
        for (let i = queue.size() - 1; 0 <= i; i--) {
            /* Time O(W) */
            const node = queue.dequeue();

            cloneNeighbors(node, seen, queue); /* Space O(N) */
        }
    }
};

const cloneNeighbors = (node, seen, queue) => {
    for (const neighbor of node.neighbors) {