How to handle expired token in javascript?

const isTokenExpired = true
let token = 'Current token'

const refreshToken = (api_request_token) => {
  console.log('Api request new token:', api_request_token)
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log('\n')
      resolve('This is new token')
    }, 2000)
  })
}

let refreshTokenRequest = null
const requestApi = async (url) => {
  if (isTokenExpired) {
    console.log('Request api with token expired:',  url, token)
    refreshTokenRequest = refreshTokenRequest ? refreshTokenRequest : refreshToken(url)
    const newToken = await refreshTokenRequest
    refreshTokenRequest = null
    token = newToken
  }

  console.log('Request api:', url, token)
}

(main = () => {
  requestApi('/me')
  requestApi('/products')
  requestApi('/posts')
})()

// Result
// Request api with token expired: /me Current token
// Api request new token: /me
// Request api with token expired: /products Current token
// Request api with token expired: /posts Current token


// Request api: /me This is new token
// Request api: /products This is new token
// Request api: /posts This is new token