[Home](./index.md) > [sip.js](./sip.js.md) > [InvitationProgressOptions](./sip.js.invitationprogressoptions.md) > [body](./sip.js.invitationprogressoptions.body.md) ## InvitationProgressOptions.body property Body Signature: ```typescript body?: string | { body: string; contentType: string; }; ```