对象过滤键值 等于 null的值

let person = [{name:"张三",age:25,address:"深圳"},{name:"张三1",age:257,address:"深圳1"}];
person.forEach((item)=>{
    Object.keys(item).map((key)=>{
        console.log(item[key])
        if(item[key] == null){
          item[key]  = ''
        }
    }) 
})