Writing to companion's javascript console

Kumaraswamy · February 13, 2026, 5:25pm

Hello. Why would you want to do that? That is not possible. But you have a better option, i.e. the Debug Panel:

Logs are also sent over WebRTC to the IDE.

Check out Notifier's LogInfo block:

    if (form.isRepl()) {
      RetValManager.appendLogValue(message, "Notifier", "OK", "Info");
    }

github.com/mit-cml/appinventor-sources

appinventor/components/src/com/google/appinventor/components/runtime/Notifier.java

master


      
              if (form.isRepl()) {
                RetValManager.appendLogValue(message, "Notifier", "OK", "Warning");
              }
            }
          
            /**
             * Writes an information message to the Android log.
             *
             * @param message the information message
             */
            @SimpleFunction(description = "Writes an information message to the Android log.")
            public void LogInfo(String message) {
              Log.i(LOG_TAG, message);
              if (form.isRepl()) {
                RetValManager.appendLogValue(message, "Notifier", "OK", "Info");
              }
            }
          }