get function return type typescript
type return_type = ReturnType<() => string>; // string
// or
function hello_world(): string {
return "hello world";
}
type return_type = ReturnType<typeof hello_world>; // stringget function return type typescript
type return_type = ReturnType<() => string>; // string
// or
function hello_world(): string {
return "hello world";
}
type return_type = ReturnType<typeof hello_world>; // stringtypescript parameter function type
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); // not OK
foo.save(numCallback); // OKCopyright © 2021 Codeinu
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