querystring通常用来处理http请求参数
import querystring from 'querystring';
const params = 'name=hy&age=21&gender=female&hobby=eat&hobby=game&lover=lq&weight=';
const paramsObject = querystring.parse(params); // 解析成js对象
const paramsObjectString = querystring.stringify(paramsObject);
console.log(params);
console.log(paramsObject);
console.log(paramsObjectString);
console.log(params === paramsObjectString); // true
