Polymer 2 Playground App

Demo app, a simple app based on polymer starter kit v3.1.0.

Features:

• Basic Polymer 2 element. Ggreeting element.
• Advanced elements. A page called Company Employees where you can add/edit/delete employee data.
• DexieJs is used to store the date.

Install

• clone git repo
• install npm, polymer-cli, bower
• inside app root folder run: npm install, bower install
• run the app: polymer serve

Build (source: PSK v3.1.0)

The polymer build command builds your Polymer application for production, using build configuration options provided by the command line or in your project's polymer.json file.

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 using the three supported presets:

"builds": [
  {
    "preset": "es5-bundled"
  },
  {
    "preset": "es6-bundled"
  },
  {
    "preset": "es6-unbundled"
  }
]

Builds will be output to a subdirectory under the build/ directory as follows:

build/
  es5-bundled/
  es6-bundled/
  es6-unbundled/

• es5-bundled is a bundled, minified build with a service worker. ES6 code is compiled to ES5 for compatibility with older browsers.
• es6-bundled is 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.
• es6-unbundled is an unbundled, minified build with a service worker. ES6 code is served as-is. This build is for browsers that support HTTP/2 push.

Run polymer help build for the full list of available options and optimizations. Also, see the documentation on the polymer.json specification and building your Polymer application for production.

Preview the build

This command serves your app. Replace build-folder-name with the folder name of the build you want to serve.

polymer serve build/build-folder-name/

Run tests

This command will run Web Component Tester against the browsers currently installed on your machine:

polymer test

If running Windows you will need to set the following environment variables:

• LAUNCHPAD_BROWSERS
• LAUNCHPAD_CHROME

Read More here daffl/launchpad

Adding a new view

You can extend the app by adding more views that will be demand-loaded e.g. based on the route, or to progressively render non-critical sections of the application. Each new demand-loaded fragment should be added to the list of fragments in the included polymer.json file. This will ensure those components and their dependencies are added to the list of pre-cached components and will be included in the build.