I am using native javascript websocket in browser and we have an application hosted on AWS where every request goes through API gateway. In some cases, request data is going upto 60kb, and then my websocket connection is closing automatically. In AWS documentation, I found out below explanation of this issue

https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-known-issues.html

API Gateway supports message payloads up to 128 KB with a maximum frame size of 32 KB. If a message exceeds 32 KB, you must split it into multiple frames, each 32 KB or smaller. If a larger message is received, the connection is closed with code 1009.

I tried to find how I can split a message in multiple frames using native javascript websocket but could not find any config related to frames in documentation or anywhere else

Although I find something related to message fragmentation but it seems like a custom solution that I need to implement at both frontend and backend https://developer.mozilla.org/en-US/docs/Web/API/WebSockets_API/Writing_WebSocket_servers#message_fragmentation