Create a scheduled message

// const sb = SendbirdChat.init(...); // For Sendbird Chat SDK initialization details, refer to:
// https://sendbird.com/docs/chat/sdk/v4/javascript/getting-started/send-first-message#2-get-started-3-step-2-initialize-sendbird-chat-sdk

// Create a scheduled user message.
const params = {
  message: 'Off work, WOOHOO!',
  scheduledAt: TODAY_AT_SIX_PM,
};
channel.createScheduledUserMessage(params)
  .onPending((message) => {
    // Pending scheduled message is received.
  })
  .onSucceeded((message) => {
    // Scheduled message is received.
  })
  .onFailed((err, message) => {
    // An error is received. Failed message is null.
  });
const handler = new GroupChannelHandler();
handler.onMessageReceived = (channel, message) => {
  // Sent scheduled message is received.
};
sb.groupChannel.addGroupChannelHandler('groupChannelHandler', handler);

interface ScheduledUserMessageCreateParams extends UserMessageCreateParams {
  scheduledAt: number;
}

// Create a scheduled file message.
const params = {
  file: FILE,
  scheduledAt: TODAY_AT_SIX_PM,
};
channel.createScheduledFileMessage(params)
  .onPending((message) => {
    // Pending scheduled message is received.
  })
  .onSucceeded((message) => {
    // Scheduled message is received.
  })
  .onFailed((err, message) => {
    // An error is received. Failed message is null.
  });
const handler = new GroupChannelHandler();
handler.onMessageReceived = (channel, message) => {
  // Sent scheduled message is received.
};
sb.groupChannel.addGroupChannelHandler('groupChannelHandler', handler);

interface ScheduledFileMessageCreateParams extends FileMessageCreateParams {
  scheduledAt: number;
}