FCM subscription fails with Polymer build js: minify=true

[ackushiw]

Description

When using polymerfire's <firebase-messaging> in a production bundle with minified JavaScript FCM registration fails.

Expected outcome

Registration token for using FCM

Actual outcome

Error in console

code: "messaging/token-subscribe-failed"
message: "Request contains an invalid argument."

Steps to reproduce

follow setup guide for polymerfire messaging With polymer.json configured

{
    "name": "unbundled",
    "addServiceWorker": true,
    "swPrecacheConfig": "sw-precache-config.js",
    "js": {"minify": true},
    "css": {"minify": true},
    "html": {"minify": true}
  }

in terminal polymer serve build/unbundled

in browser enable notifications and check console for errors

Temporary Solution

in polymer.json set "js": {"minify": false}

Browsers Affected

• [x] Chrome
• [x] Android Chrome
• [x] Opera
• [x] Firefox
• [ ] Safari 9
• [ ] Safari 8
• [ ] Safari 7
• [ ] Edge
• [ ] IE 11
• [ ] IE 10

[khammami]

https://github.com/Polymer/polymer-cli/issues/701