The `isSupported` function is not exported from the Cloud messaging module for service worker in modular V9 SDK

[TomokiMiyauci]

Describe your environment

• Firebase SDK version: 9.0.0-beta.8
• Firebase Product: messaging

Describe the problem

In firebase modular Web SDK(V9), the isSupported function is not exported from the firebase/messaging/sw module.

The documentation already has this function.
https://firebase.google.com/docs/reference/js/v9/messaging_sw.md#issupported

Steps to reproduce:

Relevant Code:

import { isSupported } from 'firebase/messaging/sw' // Bad
import { getMessaging, onBackgroundMessage } from 'firebase/messaging/sw' // OK

It is not that the type is missing, but it seems that the function does not actually exist.
When I bundle it using esbuild I get the following error.

errors: [
    {
      detail: undefined,
      location: {
        column: 9,
        file: 'src/workers/background_message.ts',
        length: 11,
        line: 3,
        lineText: "import { isSupported } from 'firebase/messaging/sw'",
        namespace: '',
        suggestion: ''
      },
      notes: [],
      pluginName: '',
      text: 'No matching export in "node_modules/firebase/messaging/sw/dist/index.esm.js" for import "isSupported"'
    }
  ]

[jbalidiong]

Hi @TomokiMiyauci, thanks for the report. I was able to reproduce the behavior. Let me check what we can do for this issue or bring someone here that can provide more context about it. I’ll update this thread if I have any information to share.