Swagger UI authorization header bearer access token

index.html

<script>
window.onload = function() {
  fetch('./swagger.json')
  .then(function(response) {
    response.json()
    .then(function(json) {
      json.schemes[0] = window.location.protocol.slice(0, -1)
      json.host = window.location.host

      const ui = SwaggerUIBundle({
        spec: json,
        dom_id: '#swagger-ui',
        deepLinking: true,
        presets: [
          SwaggerUIBundle.presets.apis
        ],
        plugins: [
          SwaggerUIBundle.plugins.DownloadUrl
        ],
        requestInterceptor: function(req) {
          req.headers.Authorization = 'Bearer ' + localStorage.getItem('accessToken')
          return req
        }
      })

      window.ui = ui
      
      addAuthButton()
    })
  })
}
  
function addAuthButton() {
  var container = document.querySelector('.information-container')
  var div = document.createElement('div')
  var button = document.createElement('button')
  button.appendChild(document.createTextNode('Authorization'))
  button.style = 'font-size: 14px; font-weight: 700; min-width: 80px; padding: 6px 15px; text-align: center; border-radius: 3px; background: #41cd8e; text-shadow: 0 1px 0 rgba(0,0,0,.1); font-family: Titillium Web,sans-serif; color: #fff; border: none;'
  button.addEventListener('click', function(event) {
    event.preventDefault()
    var token = prompt('Enter JWT access token token. Eg. eyJraW...qJSaxQ')
    if (!token) {
      localStorage.removeItem('accessToken')
      alert('Token cleared')
    } else {
      token = token.replace(/[^\d\w_.-]/gi, '')
      localStorage.setItem('accessToken', token)
    }
  })

  container.appendChild(div.appendChild(button))
}

<script>