Awesome
choo-service-worker 
Service worker loader for choo. Only runs in the browser, and emits events.
Does not include the worker code itself, you'll need to serve it using a tool
like bankai.
Usage
var choo = require('choo')
var app = choo()
if (process.env.NODE_ENV !== 'production') {
app.use(require('choo-service-worker/clear')())
}
app.use(require('choo-service-worker')())
app.mount('body')
The above example will install your service worker, and add the events and state properties documented below. For a complete example on how to use them check the example.js file.
Events
log:error | sw.events.ERROR
Emitted if the worker fails to register.
sw:installed | sw.events.INSTALLED
Emitted when the worker correctly registers for the first time.
sw:updated | sw.events.UPDATED
Emitted when an already saved worker register or update its content.
sw:redundant | sw.events.REDUNDANT
Emitted when an existing worker become redundant.
sw:postMessage | sw.events.POST_MESSAGE
Emit this to post a message to the current service worker. This event is not meant to be handled by choo (or any client).
sw:message | sw.events.MESSAGE
Listen to this event to hadle messages from the worker. This event is not meant to be sent by choo (or any client).
sw:sync | sw.events.SYNC
Emit this to register a sync tag to the service worker. This event is not meant to be handled by choo (or any client).
sw:notificationRequest | sw.events.NOTIFICATION_REQUEST
Emit this to ask for authorization to send notifications. This event is not meant to be handled by choo (or any client).
API
plugin = sw([route], [opts])
Register a new service worker if possible. Route defaults to /sw.js.
An optional opts object can be passed, you can add a electron
Boolean property to the options object, to enable registration in electron,
the rest of the options are passed directly to the registration method of
the service worker. Note that, if you enable electron with opts.electron,
the scope property will be forced to the root path of your app. Emits
events when the worker is registered. The plugin also add a few properties
to the app state.
state.syncTags:array- an array of registered tags for background syncronization.
clear = sw/clear()
Clear all service workers.