Function fn

vm/ByteCodeTranslator/src/javascript/browser_bridge.js:598–619

(event)

      return workerCallbackProxies[callbackId];
    }
    var fn = function(event) {
      var target = global.__parparWorker;
      if (!target || typeof target.postMessage !== 'function') {
        return;
      }
      var payload;
      try {
        payload = serializeEventForWorker(event);
      } catch (err) {
        payload = null;
      }
      try {
        target.postMessage({
          type: 'worker-callback',
          callbackId: callbackId,
          args: [payload]
        });
      } catch (err) {
        diag('FIRST_FAILURE', 'category', 'worker_callback_post_failed');
        diag('FIRST_FAILURE', 'message', err && err.message ? err.message : String(err));
      }
    };
    fn.__cn1WorkerCallbackId = callbackId;
    workerCallbackProxies[callbackId] = fn;
    return fn;