request header key transform to lowercase

let config = {
    method: 'POST',
    headers: {
      'Content-Type':'application/json',
      'JWTs-TOKEN': localStorage.getItem('JWTs-TOKEN'),
      'HHH': 'sdads'
    },
  }

In Chrome 51:

JWTs-TOKEN => jwts-token HHH => hhh

[calvinbrewer]

Same issue here.

Config:

config = {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Auth-Token': token,
  }
}

HTTP Request Headers: content-type: application/json auth-token: user

[matthew-andrews]

It seems this is how headers are supposed to work.