interface 定义函数

  1. interface IFun {
  2.   (num: number): void;
  3. }
  5. let ifun: IFun = (num: number): void => {};

type 定义函数

  1. type TypeFun = (num: number) => void;
  3. let tfun: TypeFun = (num: number): void => {};

对象定义函数

  1. interface IObj {
  2.   ofun: IFun;
  3. }
  5. let obj: IObj = {
  6.   ofun: (num) => {},
  7. };
  9. obj.ofun(123);