映射以及如何在JS中访问对象键?

我是编程新手,我的代码上有地图,我想访问此地图内的对象键,我该怎么做?

let person = new Map();       
person.set('name','ahmed');
person.set('age',25);
person.set('salary',80000);
person.set('gender','male');
person.set({name:'red',age:25},'reda')
for (let x of person)     
{                                                                                                                
  console.log(`key ${x[0]} and value ` );     



console.log(person.get('{name:'red',age:25}')