# Evt.merge\(\[ evt1, evt2, ... \]\)

Returns a new `Evt` instance which concurrently post all event data from every given input `Evt`.

## Returns

A new Evt that have for type argument the union of the type arguments of the inputs Evt.

## Parameters

Ctx<any> Optional,  Ctx that will be used to detach the handler that have been attached to the input Evts.

Evt<any>\[\] Evts to be merged.

## Example

```typescript
import { Evt } from "ts-evt";

const ctx= Evt.newCtx();

const evtText = new Evt<string>();
const evtTime = new Evt<number>();

//evtTextOrTime is Evt<string | number>
const evtTextOrTime= Evt.merge(ctx, [evtText, evtTime]);

evtTextOrTime.attach(console.log);

evtText.post("Foo bar"); //Prints "Foo bar"

ctx.done();

evtText.post("Foo bar"); //Prints nothing

```