Typescript中类型'Function'和类型'（）=> {}'之间的区别？

Question

如果我声明一个变量func，它将使用Typescript为它分配一个函数，我已经看到了两种不同的方法：

1）let func: Function

2）let func: () => {}

有什么区别？仅箭头功能是第二个，所有非箭头功能是第一个吗？

Answer 1

let anyFunction: Function;

let dummyFunction: () => {};

let voidFunction: () => void;


function dummy() {

}

function dummy2() {
 return {} 
}

function dumm3(arg:number) {
  return {}
}

// error dummy has ne return type.
dummyFunction = dummy;

// its ok dummy has void return type 
voidFunction = dummy;

// its ok
dummyFunction = dummy2;

//error dumm3 has argument
dummyFunction = dumm3;

// its all ok
anyFunction = dumm3;
anyFunction = dummy2;
anyFunction = dummy;

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