# Websocket error.code’larini aciklamalari

![](https://i.imgur.com/U6aLtrt.png)

```typescript
const specificStatusCodeMappings: Record<number, string> = {
	1000: "Normal Closure",
	1001: "Going Away",
	1002: "Protocol Error",
	1003: "Unsupported Data",
	1004: "(For future)",
	1005: "No Status Received",
	1006: "Abnormal Closure",
	1007: "Invalid frame payload data",
	1008: "Policy Violation",
	1009: "Message too big",
	1010: "Missing Extension",
	1011: "Internal Error",
	1012: "Service Restart",
	1013: "Try Again Later",
	1014: "Bad Gateway",
	1015: "TLS Handshake",
} as const

export function getStatusCodeString(code: number): string {
	if (code >= 0 && code <= 999) {
		return "(Unused)"
	} else if (code >= 1016) {
		if (code <= 1999) {
			return "(For WebSocket standard)"
		} else if (code <= 2999) {
			return "(For WebSocket extensions)"
		} else if (code <= 3999) {
			return "(For libraries and frameworks)"
		} else if (code <= 4999) {
			return "(For applications)"
		}
	}
	return specificStatusCodeMappings[code] ?? "(Unknown)"
}
```

```typescript
protected handleSocketClose(socketId: SocketId,	event: CloseEvent): void {
	const { code, reason = getStatusCodeString(code) } = event
	// ...
}
```

{% embed url="<https://stackoverflow.com/a/61283792/9770490>" %}


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