MessageInput Hooks

Public MessageInput hooks:

Best Practices

• Use hooks as the source of truth for composer and attachment state.
• Keep sendability checks (useMessageComposerHasSendableData) in one place.
• Treat attachment counts as derived state, not user-visible truth.
• Respect useCooldownTimer in custom inputs to avoid rate-limit issues.
• Avoid side effects inside hooks; trigger side effects in handlers instead.

useMessageComposer

Retrieve the corresponding MessageComposer instance.

useMessageComposerHasSendableData

Returns whether a message can be composed and sent. Useful for enabling/disabling the send button.

useAttachmentManagerState

Returns an object with relevant data concerning attachments. The data carried by the object are:

• attachments
• availableUploadSlots
• blockedUploadsCount
• failedUploadsCount
• isUploadEnabled
• pendingUploadsCount
• successfulUploadsCount
• uploadsInProgressCount

useCanCreatePoll

Returns whether a poll can be created. Useful for poll creation forms.

useMessageInputControls

Contributes the following to MessageInputContextValue:

• handleSubmit
• onPaste
• recordingController
• textareaRef

useCooldownTimer

A custom hook that sets up the CooldownTimer and manages its state.