javascript">const arr =['北京','上海','广州','深圳']
for (const [index,item] of arr.entries()) {
console.log(index,item)
}
打印结果
javascript">const arr =['北京','上海','广州','深圳']
for (const [index,item] of arr.entries()) {
console.log(index,item)
}
打印结果