遍历对象

const str={"name":"duxin","num":"253","index":"958"}

Object.keys(str).forEach((key)=>{console.log(key)})

for(let i in str){
    console.log(i+"===="+str[i])
}

Object.getOwnPropertyNames(str).forEach((key)=>{
    console.log(key+"===="+str[key])
})

Reflect.ownKeys(str).forEach((key)=>{
   console.log("对象索引为："+key) 
})