.... Minify and concatenate JavaScript, CSS, HTML and images to help keep your pages lean. JavaScript code linting is done using ESLint - a pluggable linter tool for identifying and reporting on patterns in JavaScript. Web Starter Kit uses ESLint with eslint-config-google, which tries to follow the Google JavaScript style guide. A built-in server for previewing your site locally while you develop and iterate. Reload the browser in real-time anytime an edit is made without the need for an extension.