localsync

localsync

a lightweight module to sync JS objects in realtime across tabs / windows of a browser. Uses local storage event emitters and falls back to cookie polling if using an unsupported browser (IE 9+ / Edge). Isomorphic. Tested with mocha.

Install

npm i -S localsync

How to use

import localsync from 'localsync'

const action = username => username
const handler = (value, old, url) => {
  console.info(`Another tab at url ${url} had username updated from ${old.username} to ${value.username}.`)
}

const usernameSync = localsync('username', action, handler)

usernameSync.start()

usernameSync.trigger('jim')

setTimeout(() => {
  usernameSync.trigger('jane')
}, 5000)

setTimeout(() => {
  if(usernameSync.isRunning)
    usernameSync.stop()
}, 10000)