方法一：Array.of
let arr = '1,2,3,4,5' // Array.of 等于 Array.prototype.of let array = Array.of(1,2,3,4,5); console.log(array);// [1,2,3,4,5]方法二：new Array
let array = new Array(5); array[0] = 1; array[1] = 2; array[2] = 3; array[3] = 4; array[4] = 5; console.log(array);// [1,2,3,4,5]方法三：字面量
let array = [1,2,3,4,5]; console.log(array);// [1,2,3,4,5]方法四：Array.fill
//Array.fill(value, start, end) // value 填充值 start 填充开始位置 end填充结束位置 let array = new Array(5).fill(1); console.log(array);// [1,1,1,1,1] //还可以用来替换数组 let arr2 = [1,2,3,4,5] console.log(arr2.fill(8,2,4))// [1, 2, 8, 8, 5]