The LoDash Docs are a Progressive Web App (PWA)
John David Dalton and the rest of the LoDash team have done a great job with the library's technology.
I love the fact I do not need to reference the entire library for my code and can just focus on the core functions.
But without great documentation the library would be a giant, frustrating time suck.
One of Lodash's strengths is its documentation. In fact I would say for any library or framework to enjoy success, free or paid, it must have easy to understand documenation.
This means you can add it to your homescreen on your phone and desktop on Windows. When it opens it opens as if it were a desktop application, without the browser chrome.
Because the LoDash site uses a service worker to cache the entire site it loads fast and works offline.
This makes it great for airplane mode! I love having reference material like this when I fly or am working away from home with no Internet connectivity.
The lodash documentation site shows that any web site can take advantage of progressive web application features. Just because your web site does not take advantage of deep platform integrations or advanced APIs does not mean it cannot be a progressive web app.