# EmitEvent

> Talos 0.6 · Since 0.6

A behavior called `events.emit`.

## Signature

```ts
export interface EmitEvent {
  type: "emit"
  frame: number
  name: string
  data: unknown
  by: string | null
}
```

Import: `import type { EmitEvent } from "@argus/api"`

## Members

| Member | Signature | Description |
|---|---|---|
| `type` | `type: "emit"` |  |
| `frame` | `frame: number` |  |
| `name` | `name: string` |  |
| `data` | `data: unknown` |  |
| `by` | `by: string \| null` |  |

## Example

The tested fixture `fixtures/app/agent.ts`.

```ts
import type { Behavior } from "@argus/api"

// Sends a nav agent to `props.target` once, then reports arrival through ctx.state so the
// test can read it without polling the crowd directly.
export default {
  init(ctx) {
    ctx.state.arrived = false
    ctx.nav?.goTo(ctx.props.target as [number, number, number])
  },
  update(ctx) {
    if (ctx.nav?.arrived) ctx.state.arrived = true
  },
} satisfies Behavior
```