Function logEvent

packages/react-devtools-shared/src/registerDevToolsEventLogger.js:29–54

(event: LoggerEvent)

    | (() => Promise<LoggerContext>),
): void {
  async function logEvent(event: LoggerEvent) {
    if (enableLogger) {
      if (currentLoggingIFrame != null && currentSessionId != null) {
        const {metadata, ...eventWithoutMetadata} = event;
        const additionalContext: LoggerContext | {} =
          fetchAdditionalContext != null ? await fetchAdditionalContext() : {};

        currentLoggingIFrame?.contentWindow?.postMessage(
          {
            source: 'react-devtools-logging',
            event: eventWithoutMetadata,
            context: {
              ...additionalContext,
              metadata: metadata != null ? JSON.stringify(metadata) : '',
              session_id: currentSessionId,
              surface,
              version: process.env.DEVTOOLS_VERSION,
            },
          },
          '*',
        );
      } else {
        missedEvents.push(event);
      }
    }
  }

  function handleLoggingIFrameLoaded(iframe: HTMLIFrameElement) {
    currentLoggingIFrame = iframe;