【慕课-付费】TypeScript语法基础-part1

TS基础 -> 爬虫 -> TS语法进阶 -> 接口 -> TS高级语法 -> 重构 -> 开发

TS: JS的超级, 需要编辑器编译为js

静态类型

let b = 123
b = '123'
let b: number = 123;

type Person {
    name: String
}
class Person {
    name: String
}
const teacher: Person = {
    name: "Jack"
}

编译为：

接口

interface Person {
  name: String,
  age?: Number,
  [propName: string]: any,
  say(): string  // 方法
}
// 函数类型
interface SayHi {
}

类应用接口

class User implements Person {
    name = 'Jack'
  say() {
      return 'hello'
  }
}

接口继承

interface Teacher extends Person {
    teach(): string
}