# ScriptErrorEvent

> Talos 0.7 · Since 0.6; changed in 0.7

A behavior threw, blew its budget, or was interrupted; it is disabled from `frame` on — unless `disabled` is false (a stale handle in a per-tick hook, which ends that call only).

## Signature

```ts
export interface ScriptErrorEvent {
  type: "script-error"
  frame: number
  entity: string
  module: string
  phase: "init" | "update" | "updateAll" | "pausedUpdate" | "dispose" | "onCollision" | "onTrigger" | "onTriggerEnter" | "onTriggerExit" | "onEvent" | "listener" | "budget"
  message: string
  /** Measured cost of the offending call, in milliseconds. */
  ms?: number
  /** False when the behavior keeps running (a stale handle in a per-tick hook); absent otherwise. */
  disabled?: false
}
```

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

## Members

| Member | Signature | Description |
|---|---|---|
| `type` | `type: "script-error"` |  |
| `frame` | `frame: number` |  |
| `entity` | `entity: string` |  |
| `module` | `module: string` |  |
| `phase` | `phase: "init" \| "update" \| "updateAll" \| "pausedUpdate" \| "dispose" \| "onCollision" \| "onTrigger" \| "onTriggerEnter" \| "onTriggerExit" \| "onEvent" \| "listener" \| "budget"` |  |
| `message` | `message: string` |  |
| `ms` | `ms?: number` | Measured cost of the offending call, in milliseconds. |
| `disabled` | `disabled?: false` | False when the behavior keeps running (a stale handle in a per-tick hook); absent otherwise. |

## 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
```