If you are using w2ui and looking for a small, non-oppininated way to organize your code, take a look at https://github.com/vitmalina/w2ui-starter. It provides a staring point (boilerplate) for an app that uses layout most suitable for w2ui applications.Clone this rpository and open src/index.html in the browser.
You can download and use nightly builds that are available at https://github.com/vitmalina/w2ui/tree/master/dist. There 2 files that you will need, w2ui.js and w2ui.css. Those files need to be included in every page where you want to use the library.You can either use a stable version or nightly builds (they are not actually nightly, more like weekly).
Below is a complete example of HTML page that uses grid widget: