for_offor_in_0">for of和for in的区别

for_of_1">for of

of遍历的是元素item

for_in_3">for in

in遍历的是索引index

示例代码

javascript">let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0];
console.log('of遍历元素item------------------------------------------');
for (let i of arr) {
    console.log(i)
}
console.log('in遍历索引index------------------------------------------');
for (let i in arr) {
    console.log(i)
}