Chat SDK for Javascript provides expansive messaging features to enhance users' chatting experience. The basic and foundational messaging features such as sending, copying, updating, and deleting a message offer essential chat experience. Also, it allows you to load messages as well as receive messages through channel event handlers. Features related to marking messages as read, getting statistics on unread messages, adding extra data to a message, reporting a message, and local caching are available to meet users' customized needs.
There are three types of messages in Sendbird Chat.
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Text message: A text message sent by a user in a channel.
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File message: A file message sent by a user in a channel.
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Admin message: A message sent only by an admin through the Chat API or the Sendbird Dashboard.
Users can interact with other users in a channel by sending, receiving, replying to messages, and more. The following is a list of features that our Chat SDK provides. All the functionalities are supported in both open channels and group channels, unless noted otherwise.
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Sends a text or file message to a channel. | |||
Sends a critical alert notification to iOS devices even when Mute or Do Not Disturb feature is on. | |||
Sends a message from an admin to a channel on the Sendbird Dashboard or using the Chat Platform API. | |||
Cancels a file upload that hasn't been completed yet. | |||
Encrypts files and thumbnail images for secure access to users in a channel. | |||
Customizes the number of messages a user can send to a channel per second. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Receives messages sent by other users in a channel through the channel event handler. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Sends a reply to a specific message in a channel. This can create a message thread. | |||
Retrieves replies to a parent message. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Retrieves a specific message in a channel. | |||
Retrieves the last message in a channel. | |||
Retrieves a list of messages that contain a search query or a specified keyword. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Copies a message in a channel and sends it to the same channel or another channel. | |||
Updates a text or file message in a channel. Users can only update their own messages. Operators can update any messages in the channel. | |||
Deletes a text or file message in a channel. Users can only delete their own messages. Operators can delete any messages in the channel. | |||
Adds an emoji to a message. | |||
Clears the chat history from the channel view of the current user. Messages aren't deleted from the Sendbird system's database and other users in the channel can still view all the messages in their own channel view. | |||
Indicates to other users in the channel that a user is typing up a message to the channel. | |||
Displays a URL link preview when a message contains a web page URL. | |||
Creates a thunmbnail of an image file. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Retrieves a set number of previous messages in a channel. | |||
Retrieves a set number of messages sent to the channel before or after a specified timestamp or message ID. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Retrieves message changelogs by timestamp or token. | |||
Customizes the number of messages displayed in a channel per second. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Marks messages in a channel as read when a user enters the channel or brings the opened channel view to the foreground. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Marks messages as delivered when a user who is online receives messages from the Sendbird server. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Includes other users in the channel in a message. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Retrieves the number of messages in a channel a user hasn't read. | |||
Retrieves the number of messages a user hasn't read in all channels they are in. | |||
Retrieves the number of channels where a user hasn't read one or more messages. | |||
Retrieve number of members who haven’t received a message in a channel | Retrieves the number of users in a channel who have yet to receive a specific message. | ||
Retrieve number of members who haven’t read a message in a channel | Retrieves the number of users in a channel who haven't read a specific message. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Specifies a custom message type to search or filter messages by. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Adds one or more key-value items to a message to add extra information. |
| Functionality | Description | Open channel | Group channel |
|---|---|---|---|
Translates messages into specified languages and sends to channel. | |||
Translates messages according to user needs. | |||
Sendbird’s message auto-translation and on-demand features are powered by Google Cloud Translation API's recognition engine. The recognition engine supports a wide variety of languages for the Neural Machine Translation (NMT) model. |