ts如何定义函数类型
时间: 2023-09-11 20:11:16 浏览: 155
回答: 在TypeScript中,可以使用以下几种方式来定义函数类型。首先,可以使用函数声明法来定义函数类型,例如:\[1\]
```typescript
function fun(): string {
return '123';
}
```
其次,可以使用匿名函数法来定义函数类型,例如:\[3\]
```typescript
let fun2 = function (): number {
return 123;
};
```
还可以定义没有返回值的方法,例如:\[3\]
```typescript
function fun3(): void {
console.log(111);
}
```
此外,为了实现函数重载,可以引入可选参数,例如:\[2\]
```typescript
function times(x: number, y?: number) {
if (y) {
return x * y;
}
return x;
}
```
以上是在TypeScript中定义函数类型的几种常见方式。
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