Typescript 中的 interface 和 type 到底有什么區(qū)別詳解

interface User {
 name: string
 age: number
}

interface SetUser {
 (name: string, age: number): void;
}

type User = {
 name: string
 age: number
};

type SetUser = (name: string, age: number): void;

interface Name { 
 name: string; 
}
interface User extends Name { 
 age: number; 
}

type Name = { 
 name: string; 
}
type User = Name & { age: number };

type Name = { 
 name: string; 
}
interface User extends Name { 
 age: number; 
}

interface Name { 
 name: string; 
}
type User = Name & { 
 age: number; 
}

// 基本類型別名
type Name = string

// 聯(lián)合類型
interface Dog {
 wong();
}
interface Cat {
 miao();
}

type Pet = Dog | Cat

// 具體定義數(shù)組每個(gè)位置的類型
type PetList = [Dog, Pet]

// 當(dāng)你想獲取一個(gè)變量的類型時(shí)，使用 typeof
let div = document.createElement('div');
type B = typeof div

type StringOrNumber = string | number; 
type Text = string | { text: string }; 
type NameLookup = Dictionary<string, Person>; 
type Callback<T> = (data: T) => void; 
type Pair<T> = [T, T]; 
type Coordinates = Pair<number>; 
type Tree<T> = T | { left: Tree<T>, right: Tree<T> };

interface User {
 name: string
 age: number
}

interface User {
 sex: string
}

/*
User 接口為 {
 name: string
 age: number
 sex: string 
}
*/