listen()

in shells/browser/shared/src/backend.js [35:51]

• 17 lines of code
• 5 McCabe index (conditional complexity)

    listen(fn) {
      const listener = event => {
        if (
          event.source !== window ||
          !event.data ||
          event.data.source !== 'relay-devtools-content-script' ||
          !event.data.payload
        ) {
          return;
        }
        fn(event.data.payload);
      };
      window.addEventListener('message', listener);
      return () => {
        window.removeEventListener('message', listener);
      };
    },