[Home](./index.md) > [sip.js](./sip.js.md) > [PublisherOptions](./sip.js.publisheroptions.md) > [unpublishOnClose](./sip.js.publisheroptions.unpublishonclose.md) ## PublisherOptions.unpublishOnClose property If set true, UA will gracefully unpublish for the event on UA close. Signature: ```typescript unpublishOnClose?: boolean; ```