数组的解构数组的合并字符串转数组 数组的解构console.log(...[1, 2, 3])// 1 2 3 数组的合并const arr1 = ['a', 'b'];const arr2 = ['c'];const arr3 = ['d', 'e'];[...arr1, ...arr2, ...arr3]// [ 'a', 'b', 'c', 'd', 'e' ] 字符串转数组[...'hello']// [ "h", "e", "l", "l", "o" ]