tencent cloud

tim.on(eventName, handler, context);

let onMessageReceived = function(event) {
  // event.data - 存储 Message 对象的数组 - [Message]
  const messageList = event.data;
  messageList.forEach((message) => {
    if (message.type === TIM.TYPES.MSG_TEXT) {
      // 文本消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.TextPayload
    } else if (message.type === TIM.TYPES.MSG_IMAGE) {
      // 图片消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.ImagePayload
    } else if (message.type === TIM.TYPES.MSG_SOUND) {
      // 音频消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.AudioPayload
    } else if (message.type === TIM.TYPES.MSG_VIDEO) {
      // 视频消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.VideoPayload
    } else if (message.type === TIM.TYPES.MSG_FILE) {
      // 文件消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.FilePayload
    } else if (message.type === TIM.TYPES.MSG_CUSTOM) {
      // 自定义消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.CustomPayload
    } else if (message.type === TIM.TYPES.MSG_MERGER) {
      // 合并消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.MergerPayload
    } else if (message.type === TIM.TYPES.MSG_LOCATION) {
      // 地理位置消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.LocationPayload
    } else if (message.type === TIM.TYPES.MSG_GRP_TIP) {
      // 群提示消息 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.GroupTipPayload
    } else if (message.type === TIM.TYPES.MSG_GRP_SYS_NOTICE) {
      // 群系统通知 - https://web.sdk.qcloud.com/im/doc/en/Message.html#.GroupSystemNoticePayload
    }
  });
};
tim.on(TIM.EVENT.MESSAGE_RECEIVED, onMessageReceived);

tim.off(eventName, handler, context, once);

let onMessageReceived = function(event) {
  // 收到推送的单聊、群聊、群提示、群系统通知的新消息，可通过遍历 event.data 获取消息列表数据并渲染到页面
  // event.name - TIM.EVENT.MESSAGE_RECEIVED
  // event.data - 存储 Message 对象的数组 - [Message]
};
tim.off(TIM.EVENT.MESSAGE_RECEIVED, onMessageReceived);