Convert OneSignal code from react-native to reactjs

Question

In react-native project. It has code paragraph:

import OneSignal from 'react-native-onesignal'
import { REGEX } from '@/Constants/Regex'

const getPushToken = async () => {
    const state = await OneSignal.getDeviceState()
    let identifier = state?.pushToken
    return identifier
  }

I must change this code to reactjs to render in my web. How can I chage this code? I tried to paste this code in to my reactjs project, I imported OneSignal from react-onesignal. However, it rendered the error when I run it function

TypeError: react_onesignal__WEBPACK_IMPORTED_MODULE_1__.default.getDeviceState is not a function