A sample ExpressJS PWA that explores and demonstrates the best practices for implementing a PWA in regards to indexability of content.

Can be configured for 3 specific rendering modes:

• Client
• Server
• Hybrid

Install this package via npm:

npm install

Install bower and the fetch polyfill to support Safari:

npm install bower
bower install fetch

Run the server via:

node server.js

Follow this link to setup your App Engine project for Node.JS:

https://cloud.google.com/nodejs/

To deploy a particular configuration to App Engine specify the yaml file:

gcloud app deploy app.yaml

Use app.yaml to set environment variables to override the config.js file.

Example .yaml file:

runtime: nodejs
vm: true
env_variables:
  AMP_MODE: disabled
  RENDER_MODE: hybrid
  UPDATE_MODE: json

Configure config.js:

• ampMode: [enabled, disabled]
• renderMode: [server, client, hybrid]
• updateMode: [json, html, disabled]
  • json: causes AJAX requests to be fetched as JSON from the server and the DOM to be updated via reading the JSON.
  • html: causes AJAX requests to be fetched as HTML from the server, the HTML is parsed on the client and the DOM to be updated via reading the parsed HTML from the server.

Recommended configuration patterns:

For server-side rendering:

{
  "ampMode": "disabled",
  "renderMode": "server",
  "updateMode": "disabled",
  "googleSiteVerificationToken": ""
}

For client-side rendering.

updateMode can be configured as either 'json' or 'html'.

{
  "ampMode": "disabled",
  "renderMode": "client",
  "updateMode": "json",
  "googleSiteVerificationToken": ""
}

For hybrid rendering.

updateMode can be configured as either 'json' or 'html'.

{
  "ampMode": "disabled",
  "renderMode": "hybrid",
  "updateMode": "json",
  "googleSiteVerificationToken": ""
}