# Evt.create(initalState?)

Evt.create() is the prefered method for instantiating an Evt as this single method allow to instantiate Evt, StatefulEvt and VoidEvt.

{% hint style="info" %}
The constructors are still useful however to avoid repeating the type of variable that are already typed e.g: `const evt: Evt<string | number> = new Evt()`
{% endhint %}

## Usage

```typescript
import { Evt, VoidEvt, StatefulEvt } from "evt";

Evt.create<string>()     ⇔     new Evt<string>()
Evt.create()             ⇔     /* An object that implement VoidEvt */
Evt.create(false)        ⇔     new StatefulEvt<boolean>(false)
```

## Why `VoidEvt` and not `Evt<void>` ?

When you instantiate an `Evt` with a void argument ( `new Evt<void>()` ), TypeScript forces you to pass `undefined` to the post method ( it does not allows to call `evt.post()` ).\
`VoidEvt` ( and respectively `VoidCtx` ) is a workaround for this annoyance.

`VoidEvt` object are instances of `Evt<void>` that you can post without passing argument.

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

const evtSocketConnect = Evt.create();

evtSocketConnect.attach(() => console.log("SOCKET CONNECTED"));

evtSocketConnect.post();
//"SOCKET CONNECTED" have been printed on the console.
```


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