# Debugging JavaScript > [https://www.youtube.com/watch?v=LVXY16PJ_jU](https://www.youtube.com/watch?v=LVXY16PJ_jU) Install [Node.js](https://nodejs.org). Within this folder run the terminal command `npm install` to install the `devDependencies`. Then run `npm start` to start up a development server on `http://localhost:9966`