js如何实现这种操作,get(obj,'k1','k2','k3').then((v)=>cons

Question

类似下面这种代码get(obj,'k1','k2','k3')     .then((v)=>console.log(v))     .else(()=>console.log('值为空'));实现下面这种代码的功能if(obj && obj.k1 && obj.k1.k2 && obj.k1.k2.k3){    console.log(obj.k1.k2.k3); }else{    console.log('值为空') }