# Strongly Typed Events - Signals
Signals are the most barebone of all events. They don't contain
any data. They just invoke the registered handler.
[](https://travis-ci.org/KeesCBakker/Strongly-Typed-Events-for-TypeScript)
[](https://badge.fury.io/js/ste-signals)
[](https://opensource.org/licenses/MIT)
### Subscription made easy
An example says more than a 1000 words. Imagine if you have events like this on your class:
```typescript
let clock = new Clock("Smu", 1000);
//log the ticks to the console - this is a signal event
clock.onTick.subscribe(() => console.log("Tick!"));
```
### Events made easy
So let's look at the implementation from a TypeScript perspective. (Do you program NodeJs without typescript? Check this)
```typescript
import { SignalDispatcher } from "ste-signals";
class Clock {
private _onTick = new SignalDispatcher();
private _ticks: number = 0;
constructor(public name: string, timeout: number) {
setInterval(() => {
this._ticks += 1;
this._onTick.dispatch();
}, timeout);
}
public get onTick() {
return this._onTick.asEvent();
}
}
```
Check the documentation or the examples for more information.
Need more info? Check the repo.
## Maintenance
This project is maintained by Kees C. Bakker.