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Changelog: Twilio Flex SDK JavaScript



Changelog

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Flex SDK 4.2.0 (July 30, 2026)

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Changes

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  • New client.connectionState getter and ClientEvent.ConnectionStateChanged event, reporting an aggregate connection state across the network and all initialized SDKs (Conversations, Voice, TaskRouter)

Flex SDK 4.1.0 (July 20, 2026)

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  • New GetChannelsForTask action to retrieve the channels associated with a task
  • New GetContentTemplates action to retrieve content templates
  • New CoachCall and BargeCall supervisor actions, building on MonitorCall
  • Bumped ws dependency to ^8.20.1

Bug fixes

  • AcceptTask now waits for the voice task to reach the accepted status before returning (previously returned once the reservation was assigned)

Flex SDK 4.0.0 (March 26, 2026)

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Flex SDK is Generally Available