new Array()与Array.of()区别

new Array(3)  //表示创建length=3 的空字符数组
Array.of(3)  //表示创建length = 1 的数组

let arr1 = new Array(3);
let arr2 = Array.of(3);
console.log(arr1.length);  //3
console.log(arr2.length);  //1