The application has the webpack-dev-server library installed, which operates like Browsersync. The library uses LiveReloading, which automatically updates the application when you make any changes to the files in /src. Since we're using a Webpack loader for C and C++ files, the automatic update event will trigger if you change the C file as well. Run the following the command to start the application and watch for changes:

npm start

A browser window should open automatically when the build completes, and then direct you to the running application. To see the live-reloading feature in action, try setting the value of the isRunning variable in the setIsRunning() function in main.c to false instead of newIsRunning:

EMSCRIPTEN_KEEPALIVE
void setIsRunning(bool newIsRunning) {
    // isRunning = newIsRunning;

    // Set the value to always false:
    isRunning = false;
}

The spaceship should be stuck in the upper-left corner. If you change it back, the spaceship starts moving again. In the next section, we will write unit tests in JavaScript to test WebAssembly modules.