属性接口

/* 
属性接口: 对方法的参数的约束
*/
interface Params{
  url: string,
  methods: string,
  data?:Object
}
function http(data: Params): void{
  console.log(data);
}
http({
  url: 'top250',
  methods: 'get'
})
http({
  url: 'login',
  methods: 'post',
  data: {
    username: 'lisi',
    pwd: 123
  }
})