HMSActions<T>

The below interface defines our SDK API Surface for taking room related actions. It talks to our 100ms backend and handles error reconnections, state managements and lots of other things so you don't have to. You can use this gateway with any sort of UI to make connecting to our backend easier. In case you use react, we also provide a HMSProvider class with very powerful hooks and out of box components which you can use to setup your website in minutes. Our components have in built integration with this interface and you won't have to worry about passing props if you use them.

Remarks

There is a one to one mapping between an instance of this class and a 100ms room, in case you're creating multiple rooms please create new instance per room.

Type parameters

Name	Type
`T`	extends `HMSGenericTypes` = { `sessionStore`: `Record`<`string`, `any`> }

Properties

audioPlaylist

• audioPlaylist: IHMSPlaylistActions

audio Playlist contains all actions that can be performed on the audio playlist This will be available after joining the room

endRoom

• endRoom: (lock: boolean, reason: string) => Promise<void>

Type declaration

▸ (lock, reason): Promise<void>

If you have the endRoom permission, you can end the room. That means everyone will be kicked out. If lock is passed as true, the room cannot be used further.

Parameters

Name	Type
`lock`	`boolean`
`reason`	`string`

Returns

Promise<void>

interactivityCenter

• interactivityCenter: HMSInteractivityCenter

sessionStore

• sessionStore: IHMSSessionStoreActions<T["sessionStore"]>

actions that can be performed on the real-time key-value store

Values in the session store are available to every peer in the room(who have observed the relevant keys) and is persisted throughout a session till the last peer leaves a room(cleared after the last peer leaves the room)

unblockAudio

• unblockAudio: () => Promise<void>

Type declaration

▸ (): Promise<void>

Method to be called with some UI interaction after autoplay error is received Most browsers have limitations where an audio can not be played if there was no user interaction. SDK throws an autoplay error in this case, this method can be called after an UI interaction to resolve the autoplay error

Returns

Promise<void>

videoPlaylist

• videoPlaylist: IHMSPlaylistActions

video Playlist contains all actions that can be performed on the video playlist This will be available after joining the room

Methods

acceptChangeRole

▸ acceptChangeRole(request): Promise<void>

Accept the role change request received

Parameters

Name	Type	Description
`request`	`HMSRoleChangeRequest`	The original request that was received

Returns

Promise<void>

addPluginToAudioTrack

▸ addPluginToAudioTrack(plugin): Promise<void>

Add or remove a audio plugin from/to the local peer audio track. Eg. gain filter, noise suppression etc. Audio plugins can be added/removed at any time after the audio track is available

Parameters

Name	Type	Description
`plugin`	`HMSAudioPlugin`	HMSAudioPlugin

Returns

Promise<void>

See

HMSAudioPlugin

addPluginToVideoTrack

▸ addPluginToVideoTrack(plugin, pluginFrameRate?): Promise<void>

Add or remove a video plugin from/to the local peer video track. Eg. Virtual Background, Face Filters etc. Video plugins can be added/removed at any time after the video track is available. pluginFrameRate is the rate at which the output plugin will do processing

Parameters

Name	Type	Description
`plugin`	`HMSVideoPlugin`	HMSVideoPlugin
`pluginFrameRate?`	`number`	number

Returns

Promise<void>

See

HMSVideoPlugin

addPluginsToVideoStream

▸ addPluginsToVideoStream(plugins): Promise<void>

Add video plugins to the local peer video stream. Eg. Virtual Background, Face Filters etc. Video plugins can be added/removed at any time after the video track is available.

Parameters

Name	Type
`plugins`	`HMSMediaStreamPlugin`[]

Returns

Promise<void>

See

HMSMediaStreamPlugin

addTrack

▸ addTrack(track, type): Promise<void>

You can use the addTrack method to add an auxiliary track(canvas capture, electron screen-share, etc...) This method adds the track to the local peer's list of auxiliary tracks and publishes it to make it available to remote peers.

Parameters

Name	Type	Description
`track`	`MediaStreamTrack`	MediaStreamTrack - Track to be added
`type`	`string`	HMSTrackSource - 'regular' \| 'screen' \| 'plugin' - Source of track - default: 'regular'

Returns

Promise<void>

attachVideo

▸ attachVideo(localTrackID, videoElement): Promise<void>

You can use the attach and detach video function to add/remove video from an element for a track ID. The benefit of using this instead of removing the video yourself is that it'll also auto unsubscribe to the stream coming from server saving significant bandwidth for the user.

Parameters

Name	Type	Description
`localTrackID`	`string`	trackID as stored in the store for the peer
`videoElement`	`HTMLVideoElement`	HTML native element where the video has to be shown

Returns

Promise<void>

cancelMidCallPreview

▸ cancelMidCallPreview(): Promise<void>

stop tracks fetched during midcall preview and general cleanup

Returns

Promise<void>

changeMetadata

▸ changeMetadata(metadata): Promise<void>

If you want to update the metadata of local peer. If an object is passed, it should be serializable using JSON.stringify.

Parameters

Name	Type
`metadata`	`any`

Returns

Promise<void>

changeName

▸ changeName(name): Promise<void>

If you want to update the name of peer.

Parameters

Name	Type
`name`	`string`

Returns

Promise<void>

changeRole

▸ changeRole(forPeerId, toRole, force?): Promise<void>

Request for a role change of a remote peer. Can be forced.

Parameters

Name	Type	Description
`forPeerId`	`string`	The remote peer id whose role needs to be changed
`toRole`	`string`	The name of the new role.
`force?`	`boolean`	this being true would mean that user won't get a request to accept role change

Returns

Promise<void>

Deprecated

Use changeRoleOfPeer

changeRoleOfPeer

▸ changeRoleOfPeer(forPeerId, toRole, force?): Promise<void>

Request for a role change of a remote peer. Can be forced.

Parameters

Name	Type	Description
`forPeerId`	`string`	The remote peer id whose role needs to be changed
`toRole`	`string`	The name of the new role.
`force?`	`boolean`	this being true would mean that user won't get a request to accept role change

Returns

Promise<void>

changeRoleOfPeersWithRoles

▸ changeRoleOfPeersWithRoles(roles, toRole): Promise<void>

Request for a role change of a remote peer. Can be forced.

Parameters

Name	Type	Description
`roles`	`string`[]	List of roles whose role needs to be changed
`toRole`	`string`	The name of the new role.

Returns

Promise<void>

detachVideo

▸ detachVideo(localTrackID, videoElement): Promise<void>

Parameters

Name	Type
`localTrackID`	`string`
`videoElement`	`HTMLVideoElement`

Returns

Promise<void>

See

attachVideo

enableBeamSpeakerLabelsLogging

▸ enableBeamSpeakerLabelsLogging(): Promise<void>

enable sending audio speaker data to beam

Returns

Promise<void>

findPeerByName

▸ findPeerByName(options): Promise<{ eof?: boolean ; offset: number ; peers: HMSPeer[] }>

Parameters

Name	Type
`options`	`FindPeerByNameRequestParams`

Returns

Promise<{ eof?: boolean ; offset: number ; peers: HMSPeer[] }>

getAuthTokenByRoomCode

▸ getAuthTokenByRoomCode(tokenRequest, tokenRequestOptions?): Promise<string>

Parameters

Name	Type
`tokenRequest`	`TokenRequest`
`tokenRequestOptions?`	`TokenRequestOptions`

Returns

Promise<string>

getNativeTrackById

▸ getNativeTrackById(trackId): undefined | MediaStreamTrack

Parameters

Name	Type	Description
`trackId`	`string`	pass the trackId from store (for instance, peer.audioTrack) for which you want the native MediaStreamTrack instance. Be cautious when using this and modifying the underlying MediastreamTrack. Note: In case of local peer, the native audio track will change the first time it is unmuted. In case of video track, the native track changes everytime you mute/unmute. Be cautious when using this. This will not be needed unless you want to do some extra processing on the audio/video tracks. We recommend using our plugins for the same instead

Returns

undefined | MediaStreamTrack

getPeer

▸ getPeer(peerId): Promise<undefined | HMSPeer>

Parameters

Name	Type
`peerId`	`string`

Returns

Promise<undefined | HMSPeer>

getPeerListIterator

▸ getPeerListIterator(options?): HMSPeerListIterator

Parameters

Name	Type
`options?`	`HMSPeerListIteratorOptions`

Returns

HMSPeerListIterator

getTrackById

▸ getTrackById(trackId): undefined | HMSTrack

Parameters

Name	Type
`trackId`	`string`

Returns

undefined | HMSTrack

ignoreMessageTypes

▸ ignoreMessageTypes(msgTypes, replace?): void

ignore messages with this type for storing in store. You can use this to have a clear segregation between chat messages(you would want to persist for the duration of the call) and one off custom events(emoji reactions, stop screenshare, moderator messages, etc.). You can also use this to store messages on your own side if some additional processing is required(the default type is "chat"). Notifications for the ignored messages will still be sent, it'll only not be put in the store.

Parameters

Name	Type	Description
`msgTypes`	`string`[]	list of messages types to ignore for storing
`replace?`	`boolean`	(default is false) whether to replace the list of ignored messages. Types are appended to the existing list by default so you can call this method from different places and all will hold.

Returns

void

initAppData

▸ initAppData(data): void

Parameters

Name	Type	Description
`data`	`Record`<`string`, `any`>	full app data object. use this to initialise app data in store. App Data is a small space in the store for UI to keep a few non updating global state fields for easy reference across UI. Note that if the fields are updating at high frequency or there are too many of them, it's recommended to have another UI side store to avoid performance issues.

Returns

void

initDiagnostics

▸ initDiagnostics(): HMSDiagnosticsInterface

Returns

HMSDiagnosticsInterface

join

▸ join(config): Promise<void>

join function can be used to join the room, if the room join is successful, current details of participants and track details are populated in the store.

Parameters

Name	Type	Description
`config`	`HMSConfig`	join config with room id, required for joining the room

Returns

Promise<void>

Remarks

If join is called while an earlier join is in progress for the room id, it is ignored

leave

▸ leave(): Promise<void>

This function can be used to leave the room, if the call is repeated it's ignored.

Returns

Promise<void>

lowerLocalPeerHand

▸ lowerLocalPeerHand(): Promise<void>

Returns

Promise<void>

lowerRemotePeerHand

▸ lowerRemotePeerHand(peerId): Promise<void>

Parameters

Name	Type
`peerId`	`string`

Returns

Promise<void>

populateSessionMetadata

▸ populateSessionMetadata(): Promise<void>

Fetch the current room metadata from the server and populate it in store

Returns

Promise<void>

Deprecated

use actions.sessionStore.observe instead

preview

▸ preview(config): Promise<void>

Parameters

Name	Type
`config`	`HMSMidCallPreviewConfig` \| `HMSPreviewConfig`

Returns

Promise<void>

raiseLocalPeerHand

▸ raiseLocalPeerHand(): Promise<void>

Returns

Promise<void>

raiseRemotePeerHand

▸ raiseRemotePeerHand(peerId): Promise<void>

Parameters

Name	Type
`peerId`	`string`

Returns

Promise<void>

refreshDevices

▸ refreshDevices(): Promise<void>

Returns

Promise<void>

rejectChangeRole

▸ rejectChangeRole(request): void

Reject pending role change request

Parameters

Name	Type	Description
`request`	`HMSRoleChangeRequest`	The original request that was received

Returns

void

removePeer

▸ removePeer(peerID, reason): Promise<void>

If you have removeOthers permission, you can remove a peer from the room.

Parameters

Name	Type	Description
`peerID`	`string`	peerID of the peer to be removed from the room
`reason`	`string`	a string explaining why the peer is removed from the room. This string could be used to notify the user before they're removed from the room using the `REMOVED_FROM_ROOM` type of notification

Returns

Promise<void>

removePluginFromAudioTrack

▸ removePluginFromAudioTrack(plugin): Promise<void>

Parameters

Name	Type
`plugin`	`HMSAudioPlugin`

Returns

Promise<void>

See

addPluginToAudioTrack

removePluginFromVideoTrack

▸ removePluginFromVideoTrack(plugin): Promise<void>

Parameters

Name	Type
`plugin`	`HMSVideoPlugin`

Returns

Promise<void>

See

addPluginToVideoTrack

removePluginsFromVideoStream

▸ removePluginsFromVideoStream(plugins): Promise<void>

Remove video plugins to the local peer video stream. Eg. Virtual Background, Face Filters etc. Video plugins can be added/removed at any time after the video track is available.

Parameters

Name	Type
`plugins`	`HMSMediaStreamPlugin`[]

Returns

Promise<void>

See

HMSMediaStreamPlugin

removeTrack

▸ removeTrack(trackId): Promise<void>

You can use the removeTrack method to remove an auxiliary track. This method removes the track from the local peer's list of auxiliary tracks and unpublishes it.

Parameters

Name	Type	Description
`trackId`	`string`	string - ID of the track to be removed

Returns

Promise<void>

sendBroadcastMessage

▸ sendBroadcastMessage(message, type?): Promise<void>

Send a plain text message to all the other participants in the room.

Parameters

Name	Type	Description
`message`	`string`	string message to broadcast
`type?`	`string`	type of message. For example: image, video etc. - optional defaults to chat

Returns

Promise<void>

sendDirectMessage

▸ sendDirectMessage(message, peerID, type?): Promise<void>

Parameters

Name	Type	Description
`message`	`string`
`peerID`	`string`	id of the peer to which message has to be sent
`type?`	`string`	type of message. For example: image, video etc. - optional defaults to chat

Returns

Promise<void>

sendGroupMessage

▸ sendGroupMessage(message, roles, type?): Promise<void>

Parameters

Name	Type	Description
`message`	`string`	string message to send
`roles`	`string`[]	roles to which to send the message
`type?`	`string`	type of message. For example: image, video etc. - optional defaults to chat

Returns

Promise<void>

sendHLSTimedMetadata

▸ sendHLSTimedMetadata(metadataList): Promise<void>

Used to define date range metadata in a media playlist. This api adds EXT-X-DATERANGE tags to the media playlist. It is useful for defining timed metadata for interstitial regions such as advertisements, but can be used to define any timed metadata needed by your stream. usage (e.g) const metadataList = [{ payload: "some string 1", duration: 2 }, { payload: "some string 2", duration: 3 }] sendHLSTimedMetadata(metadataList);

Parameters

Name	Type
`metadataList`	`HLSTimedMetadata`[]

Returns

Promise<void>

sendMessage

▸ sendMessage(message): void

Parameters

Name	Type	Description
`message`	`string`	string message to broadcast

Returns

void

Deprecated

The method should not be used

See

sendBroadcastMessage Send a plain text message to all the other participants in the room.

setAppData

▸ setAppData(key, value, merge?): void

use it for updating a particular property in the appdata

Parameters

Name	Type	Description
`key`	`string`	a string. Does not check for existence. If the key is already not a property of the appData, it is added.
`value`	`Record`<`string` \| `number`, `any`>	value to set for the key.
`merge?`	`boolean`	set it to true if you want to merge the appdata. - Always replaces the value for a given key if this parameter is not explicitly set to true. - Always replaces if the value is anything other than a plain object (i.e) JSON.parse()able. - If set to true on non-plain objects, this is ignored.

Returns

void

Example


assume appData is initially
 `{
    mySettings: {
      setting1: 'val1',
      setting2: 'val2',
    },
    mySettings2: 43,
    mySettings3: false,
  };`

after calling,
`setAppData("mySettings", {setting1:'val1-edit', setting3:'val3'}, true);`
it becomes
 `{
    mySettings: {
      setting1: 'val1-edit',
      setting2: 'val2',
      setting3: 'val3',
    },
    mySettings2: 43,
    mySettings3: false,
  };`

Note: This is not suitable for keeping large data or data which updates
at a high frequency, it is recommended to use app side store for those
cases.

▸ setAppData(key, value): void

Parameters

Name	Type
`key`	`string`
`value`	`any`

Returns

void

setAudioOutputDevice

▸ setAudioOutputDevice(deviceId): Promise<void>

Set the audio output(speaker) device

Parameters

Name	Type	Description
`deviceId`	`string`	string deviceId of the audio output device

Returns

Promise<void>

setAudioSettings

▸ setAudioSettings(settings): Promise<void>

Change settings of the local peer's audio track

Parameters

Name	Type	Description
`settings`	`Partial`<`HMSAudioTrackSettings`>	HMSAudioTrackSettings `({ volume, codec, maxBitrate, deviceId, advanced })`

Returns

Promise<void>

setEnabledTrack

▸ setEnabledTrack(trackId, enabled): Promise<void>

Parameters

Name	Type	Description
`trackId`	`string`	string - ID of the track whose mute status needs to be set
`enabled`	`boolean`	boolean - true when we want to unmute the track and false when we want to unmute it

Returns

Promise<void>

setLocalAudioEnabled

▸ setLocalAudioEnabled(enabled): Promise<void>

This function can be used to enable/disable(unmute/mute) local audio track

Parameters

Name	Type	Description
`enabled`	`boolean`	boolean - true to unmute, false to mute

Returns

Promise<void>

setLocalVideoEnabled

▸ setLocalVideoEnabled(enabled): Promise<void>

This function can be used to enable/disable(unmute/mute) local video track

Parameters

Name	Type	Description
`enabled`	`boolean`	boolean - true to unmute, false to mute

Returns

Promise<void>

setLogLevel

▸ setLogLevel(level): void

Set the type of logs from the SDK you want to be logged in the browser console.

Note that HMSLogLevel is decremental meaning,

HMSLogLevel.VERBOSE(0) - will log every message from SDK.
HMSLogLevel.DEBUG(1) - will log messages that are helpful in debugging, important info, warnings and errors.
HMSLogLevel.INFO(2) - will log important info, warnings and errors.
HMSLogLevel.WARN(3) - will log warnings and errors.
HMSLogLevel.ERROR(4) - will log only errors.
HMSLogLevel.NONE(5) - won't log anything(Not recommended).

Usage: hmsActions.setLogLevel(4) or hmsActions.setLogLevel(HMSlogLevel.ERROR).

Parameters

Name	Type
`level`	`HMSLogLevel`

Returns

void

setMessageRead

▸ setMessageRead(readStatus, messageId?): void

If just readStatus argument is passed, the function will set read flag of every message as the readStatus argument passed. If both readStatus and messageId argument is passed, then just read flag of message with passed messageId will be set as readStatus argument. if message with passed messageId is not found in store, no change in store will take place.

Parameters

Name	Type	Description
`readStatus`	`boolean`	boolean value which you want to set as read flag for message/messages.
`messageId?`	`string`	message id whose read flag you want to set.

Returns

void

setPlaylistSettings

▸ setPlaylistSettings(settings): void

Method to override the default settings for playlist tracks

Parameters

Name	Type
`settings`	`HMSPlaylistSettings`

Returns

void

setPreferredLayer

▸ setPreferredLayer(trackId, layer): Promise<void>

set the quality of the selected videoTrack for simulcast.

Parameters

Name	Type
`trackId`	`string`
`layer`	`HMSPreferredSimulcastLayer`

Returns

Promise<void>

setRemoteTrackEnabled

▸ setRemoteTrackEnabled(forRemoteTrackID, enabled): Promise<void>

Change track state a remote peer's track This can be used to mute/unmute a remote peer's track

Parameters

Name	Type	Description
`forRemoteTrackID`	`string` \| `string`[]	The track ID or array of track IDs for which you want to change the state
`enabled`	`boolean`	`true` if you wish to enable(unmute permission is required) the track, `false` if you wish to disable(mute permission is required) the track

Returns

Promise<void>

setRemoteTracksEnabled

▸ setRemoteTracksEnabled(params): Promise<void>

Use this to mute/unmute multiple tracks by source, role or type

Parameters

Name	Type
`params`	`HMSChangeMultiTrackStateParams`

Returns

Promise<void>

setScreenShareEnabled

▸ setScreenShareEnabled(enabled, config?): Promise<void>

If you want to enable screenshare for the local peer this class can be called. The store will be populated with the incoming track, and the subscriber(or react component if our hook is used) will be notified/rerendered

Parameters

Name	Type	Description
`enabled`	`boolean`	boolean
`config?`	`HMSScreenShareConfig`	check the config object for details about the fields

Returns

Promise<void>

setSessionMetadata

▸ setSessionMetadata(metadata): Promise<void>

If you want to update the metadata of the session. If an object is passed, it should be serializable using JSON.stringify.

Session metadata is available to every peer in the room and is persisted throughout a session till the last peer leaves a room

Parameters

Name	Type
`metadata`	`any`

Returns

Promise<void>

Deprecated

use actions.sessionStore.set instead

setVideoSettings

▸ setVideoSettings(settings): Promise<void>

Change settings of the local peer's video track

Parameters

Name	Type	Description
`settings`	`Partial`<`HMSVideoTrackSettings`>	HMSVideoTrackSettings `({ width, height, codec, maxFramerate, maxBitrate, deviceId, advanced, facingMode })`

Returns

Promise<void>

setVolume

▸ setVolume(value, trackId?): Promise<void>

Set the output volume of audio tracks(overall/particular audio track)

Parameters

Name	Type	Description
`value`	`number`	number between 0-100
`trackId?`	`string`	string If undefined sets the overall volume(of every audio track in the room); If valid - set the volume of particular audio track

Returns

Promise<void>

startHLSStreaming

▸ startHLSStreaming(params?): Promise<void>

If you have configured HLS streaming from dashboard, no params are required. otherwise

Parameters

Name	Type
`params?`	`HLSConfig`

Returns

Promise<void>

startRTMPOrRecording

▸ startRTMPOrRecording(params): Promise<void>

If you want to start RTMP streaming or recording.

Parameters

Name	Type
`params`	`RTMPRecordingConfig`

Returns

Promise<void>

startTranscription

▸ startTranscription(params): Promise<void>

If you want to start transcriptions(Closed Caption).

Parameters

Name	Type
`params`	`TranscriptionConfig`

Returns

Promise<void>

stopHLSStreaming

▸ stopHLSStreaming(params?): Promise<void>

If you want to stop HLS streaming. The passed in arguments is not considered at the moment, and everything related to HLS is stopped.

Parameters

Name	Type
`params?`	`HLSConfig`

Returns

Promise<void>

stopRTMPAndRecording

▸ stopRTMPAndRecording(): Promise<void>

If you want to stop both RTMP streaming and recording.

Returns

Promise<void>

stopTranscription

▸ stopTranscription(params): Promise<void>

If you want to stop transcriptions(Closed Caption).

Parameters

Name	Type
`params`	`TranscriptionConfig`

Returns

Promise<void>

submitSessionFeedback

▸ submitSessionFeedback(feedback, eventEndpoint?): Promise<void>

After leave send feedback to backend for call quality purpose.

Parameters

Name	Type
`feedback`	`HMSSessionFeedback`
`eventEndpoint?`	`string`

Returns

Promise<void>

switchCamera

▸ switchCamera(): Promise<void>

Toggle the camera between front and back if the both the camera's exist

Returns

Promise<void>

validateAudioPluginSupport

▸ validateAudioPluginSupport(plugin): HMSPluginSupportResult

To check the support of the plugin, based on browser, os and audio devices

Parameters

Name	Type	Description
`plugin`	`HMSAudioPlugin`	HMSAudioPlugin

Returns

HMSPluginSupportResult

See

HMSPluginSupportResult

validateVideoPluginSupport

▸ validateVideoPluginSupport(plugin): HMSPluginSupportResult

To check the support of the plugin, based on browser, os and audio devices

Parameters

Name	Type	Description
`plugin`	`HMSVideoPlugin`	HMSVideoPlugin

Returns

HMSPluginSupportResult

See

HMSPluginSupportResult

IHMSStatsStore IHMSStore<T>

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