怎么动态组装一个json字符串？

const map = new Map([ 
  ['name', '张三'], 
  ['age', '18'], 
  ['address', 'xian'], 
]); 
let jsonObject:Record<string,Object> = {}; 
map.forEach((value,key) => { 
  if (key != undefined && value != undefined) { 
    jsonObject[key] = value; 
  } 
}) 
 
let info:string = JSON.stringify(jsonObject);