I was wondering is it possible to catch a Javascript response using PHP?

I'm calling this

const requestPermission = (callback) => {
    client
      .requestPermissions(/*{ network: { type: beacon.NetworkType.DELPHINET } }*/)
      .then((permissions) => {
        console.log('permissions', permissions)
        if (callback) {
          callback(permissions)
        }
        updateActiveAccount()
      })
      .catch((error) => {
        console.log('error during permission request', error)
      })
  }

Using client.requestPermissions()

Once I allow permissions, pending response fullfills as follow:

What I need is address as soon as response appears (prior any client edits, injections), is it doable? Thanks