# ConnectOptions

**ConnectOptions** can be used as an input parameter to receive status changes during the connection to a background service. For example, it is used as an input parameter of [connectServiceExtensionAbility](js-apis-inner-application-uiAbilityContext.md#uiabilitycontextconnectserviceextensionability) to connect to a ServiceExtensionAbility.

**System capability**: SystemCapability.Ability.AbilityRuntime.Core

| Name          | Type      | Mandatory  | Description                       |
| ------------ | -------- | ---- | ------------------------- |
| onConnect<sup>7+</sup>    | function | Yes   | Callback invoked when a connection is set up.     |
| onDisconnect<sup>7+</sup> | function | Yes   | Callback invoked when a connection is interrupted.          |
| onFailed<sup>7+</sup>     | function | Yes   | Callback invoked when a connection fails.|