CodePudding user response:
Many low version of the browser support for websocket is not very good, just need to do at this time of downward compatibility, generally is mixed using websocket + polling done these, there are some trouble, in a formal project can consider using a third party to push framework GoEasy, for example, the compatibility is ready, also support the WSS, heartbeat, reconnection mechanism, address: https://www.goeasy.io/