SDKsWASM

Receive custom business messages

Listen for custom business notifications delivered by the server through the WASM SDK.

SdkEvent.OnRecvCustomBusinessMessage delivers business notifications from the server. Its event data is not a MessageItem. Ordinary custom chat messages still arrive through the new-message events.

import { SdkEvent } from '@openim/wasm-client-sdk';

function handleCustomBusinessMessage({ data }) {
  const payload = parseAndValidateBusinessPayload(data);
  applyBusinessPayload(payload);
}

openimsdk.on(
  SdkEvent.OnRecvCustomBusinessMessage,
  handleCustomBusinessMessage,
);

function removeCustomBusinessMessageListener() {
  openimsdk.off(
    SdkEvent.OnRecvCustomBusinessMessage,
    handleCustomBusinessMessage,
  );
}

Keep a stable reference to the handler function. The business data should contain an ID that uniquely identifies the notification. Use that ID to update state and ignore duplicates; do not rely on arrival order or array position.

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