npm i @litt1e-p/notification-center --save

import { NotificationCenter } from '@litt1e-p/notification-center'

// 1. add observer
NotificationCenter.$addObserver('noticeName', cb)

// 2. post a message
NotificationCenter.$post('noticeName', someMessage)

// 3. remove an observer when destroy
NotificationCenter.$removeObserver('noticeName', cb)


function cb (msg) {
  console.info(msg)
}
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