Defining TypeScript callback type
I just found something in the TypeScript language specification, it's fairly easy. I was pretty close.
the syntax is the following:
public myCallback: (name: type) => returntype;In my example, it would be
class CallbackTest{ public myCallback: () => void; public doWork(): void { //doing some work... this.myCallback(); //calling callback }}
To go one step further, you could declare a type pointer to a function signature like:
interface myCallbackType { (myArgument: string): void }and use it like this:
public myCallback : myCallbackType;
You can declare a new type:
declare type MyHandler = (myArgument: string) => void;var handler: MyHandler;Update.
The declare keyword is not necessary. It should be used in the .d.ts files or in similar cases.