ES6 Set() 用法问题

Question

怎么把创建的Set()以数组形式的string存到localStorage？

Answer 1

leta=newSet([1,2,3]);
letb=Array.from(a);
localStorage.setItem("somename",JSON.stringify(b))
                            

Answer 2

localStroage.setItem('someName',JSON.stringify(Aarry.from(newSet([1,2,3]))))