Polymer App Toolbox - Starter Kit
This template is a starting point for building apps using a drawer-based
layout. The layout is provided by
This template, along with the
polymer-cli toolchain, also demonstrates use
of the "PRPL pattern" This pattern allows fast first delivery and interaction with
the content at the initial route requested by the user, along with fast subsequent
navigation by pre-caching the remaining components required by the app and
progressively loading them on-demand as the user navigates through the app.
The PRPL pattern, in a nutshell:
- Push components required for the initial route
- Render initial route ASAP
- Pre-cache components for remaining routes
- Lazy-load and progressively upgrade next routes on-demand
npm install -g polymer-cli
Initialize project from template
mkdir my-app cd my-app polymer init polymer-3-starter-kit
Start the development server
This command serves the app at
http://127.0.0.1:8081 and provides basic URL
routing for the app:
npm run build command builds your Polymer application for production, using build configuration options provided by the command line or in your project's
You can configure your
polymer.json file to create multiple builds. This is necessary if you will be serving different builds optimized for different browsers. You can define your own named builds, or use presets. See the documentation on building your project for production for more information.
The Polymer Starter Kit is configured to create three builds. These builds will be output to a subdirectory under the
build/ directory as follows:
build/ es5-bundled/ es6-bundled/ esm-bundled/
es5-bundledis a bundled, minified build with a service worker. ES6 code is compiled to ES5 for compatibility with older browsers.
es6-bundledis a bundled, minified build with a service worker. ES6 code is served as-is. This build is for browsers that can handle ES6 code - see building your project for production for a list.
esm-bundledis a bundled, minified build with a service worker. It uses standard ES module import/export statements for browsers that support them.
Preview the build
This command serves your app. Replace
build-folder-name with the folder name of the build you want to serve.
npm start build/build-folder-name/
This command will run Web Component Tester against the browsers currently installed on your machine:
If running Windows you will need to set the following environment variables:
Read More here daffl/launchpad
Looking for our older PSK2 Polycast or migration blog post? See the previous README.