return any typescript code example
Example 1: typescript pass a function as an argunetn
class Foo {
save(callback: (n: number) => any) : void {
callback(42);
}
}
var foo = new Foo();
var strCallback = (result: string) : void => {
alert(result);
}
var numCallback = (result: number) : void => {
alert(result.toString());
}
foo.save(strCallback);
foo.save(numCallback);
Example 2: get function return type typescript
type return_type = ReturnType<() => string>;
function hello_world(): string {
return "hello world";
}
type return_type = ReturnType<typeof hello_world>;