Object、object、{}

// Object 在原型链中基本类型和引用类型都指向Oject，因此Object是包含所有的类型

let o:Object = 123
let o1:Object = true
let o2:Object = '123'
let o3:Object = {name: 'aaa'}
let o4:Object = []

// {}类型等同于Object
let o5:{} = 123
let o6:{} = true
let o7:{} = '123'
let o8:{} = {name: 'xiaoming'}
let o9:{} = []

// {}和Object的对象格式都无法修改
// o3.name = 16 // 报错
// o8.age = 16 // 报错

// object 指的是针对引用类型
let o10:object = []
let o11:object = {}
let o12:object = () => {}
// let o13:object = 123 // 报错，基本格式无法赋值给object