当你需要取多个数组中的交集 ~~~ const intersection = (a, ...arr) => [...new Set(a)].filter((v) => arr.every((b) => b.includes(v))) intersection([1, 2, 3, 4], [2, 3, 4, 7, 8], [1, 3, 4, 9]) // [3, 4] ~~~