1、基本类型 string、number、boolean
let isDone: boolean = false; isDone = true; let u:undefined = undefined; let n:null = null;
2、数组/元组
let student:Array<string> = ['tom','lily']; let student2:string[] = ['tom','lily']; let tuple1:[string,number] = ['time',22];
3、any
let obj:any = 'www';//123 obj.name = 123;
4、interface 接口（对象模板）
interface IStudent {
name:string;
readonly age:number;
jump?:()=>void;
}
const tom:IStudent = {
name:'tom',
age:22,
// jump() {
// },
}
5、函数
function add(x:number,y:number):number{
return x+y
}
6、泛型
function echo<T>(x:T[]){
return x;
}
const result = echo(['lily'])
7、Enum 枚举
enum color{
red,
green,
blue
}
let r = color[0]
console.log('r:',r)
8、联合类型
type StringOrNumber = string | number; let studentId:StringOrNumber = '0'; //0
9、type aliase (类型别名)
let sum:(x:number,y:number) => number;
// const results = sum(1,2)
type PlusType = (x:number,y:number) => number;
let doSum:PlusType = (x,y)=>{
return x+y
}
let nickname:'tom' = 'tom'
type Directions = 'Up' | 'Down' | 'Left' | 'Right';
let toWhere:Directions = 'Up'
interface Iperson{
name:string;
}
type PersonType = Iperson & { age:number}
let stu1:PersonType = {
name:'dd',
age:32
}
// axios.post('url',{name:'vicky'})
import calculator from './calculator'
// calculator('plus',[2,3])
calculator.plus([1,2]);
10、utility type
let vicky:PersonType = { name:'vicky', age:18 }
type Ipartial = Partial<PersonType>
let tom2:Ipartial = {name:'tom'}
type IOmit = Omit<PersonType,'name'>
let lily:IOmit = {age:22}