In the toolbox, developers get a set of loosely coupled components and tools to build a Progressive Web Application using the "modern platform," Google said.
"The toolbox is just a set of components and tools based around Web platform primitives that make it easy to build cutting-edge Progressive Web applications," said Taylor Savage, Google product manager for Polymer. It includes components for layout, routing, localization, and storage, as well as a command-line tool to tie everything together.
Polymer, meanwhile, features a library to leverage Web Components, a standardized platform for extending HTML and componentizing apps.
Instead, mobile Web apps can be built using what's already in the browser, via the Web platform. "On the Polymer project, we want to make it easy by building tools and libraries to leverage these new powerful features to build lower-overhead, higher-quality applications," Savage said.
Google is offering guidance on getting started with Polymer App Toolbox, involving installation of the Polymer CLI, initializing project templates, and serving projects.