Inoreader unread badge extension for Wavebox

background.js

chrome.runtime.onMessage.addListener(async (payload, sender)=>{
  if (payload.type === "setBadge") {
    // Check if my message is from an app
    const {isApp} = await chrome.waveboxApps.getInfo(sender.tab.id)
    if (isApp) {
      const count = parseInt(payload.count)
      if (isNaN(count)) await chrome.waveboxApps.setBadge(sender.tab.id, {count: 0, activity: true})
      else await chrome.waveboxApps.setBadge(sender.tab.id, {count, activity: false})
    }
  }
})

contentscript.js

const freq = 5 * 60 * 1000 // check for updates every five minutes

// function to get unread count from the content page
// return 0 to clear the badge, or NaN for a blank activity badge
const getCount = () => parseInt(total_unread_cnt.textContent)

// you *shouldn't* have to touch anything below here

let prevCount = null
const updateBadge = () => {
  const count = getCount()
  console.debug("[Wavebox] Checking new badge count", {count}) // set your console level to "verbose" if you want to see this message
  if(count !== prevCount) {
    chrome.runtime.sendMessage({type: "setBadge", count})
    prevCount = count
  }
}
updateBadge()
setInterval(updateBadge, freq)

manifest.json

{
  "manifest_version": 3,
  "version": "1",
  "name": "inoreader unread count",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA1oh0kyuK0Xy45BVlxTlR1rDFqs7wIPLTLzDqTL+mSyfBf6O6W50HXy2BQPLju8SD7boOH8gJkFQY9/ptHS0ghviuGpVjmg0BuJ8ymZFdd8XPmhAFqtpJti/tkW00/FXzERvkCD8K9Ww5Mn06cTcUxtE28gCjpaUHl5SpBr9Lr1Oz2k9AdBRhnslq5gFdWzwfYrVt9v0ENTNcGjl/uI7pm9bqRE+HP0gb3p40bznq0YS0KT7vkoHkpbTHN7vxHI8jd5MmhNWihfp86TWqC3ebqNhgOgFO+Hm1KMJj0Yfh+jUp5GHR7xZ4L7+IWhcyiNWNJy2UAiIFzPqziDRZ3nYPgwIDAQAB",
  "background": {
    "service_worker": "background.js"
  },
  "permissions": [
    "waveboxApps"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://*.inoreader.com/*"
      ],
      "js": [
        "contentscript.js"
      ]
    }
  ]
}