javascript - VueJs and VueResource, removing header fields from a Ajax request -

when instantiate vuejs (2.2.6) , vue-resource (1.2.1), set header authorization following code, way can authorize requests api:

vue.http.headers.common.authorization = 'bearer ...'; 

however, want make request third party api, , not want authorization field sent. additionally, api not allow use authorization header.

let cep = '';  this.$http.get('https://viacep.com.br/ws/' + cep + '/json')     .then(response => {         console.log(response.headers);     }); 

this way authorization field sent header, on access-control-request-headers:

i tried remove header fields following codes, without success.

this.$http.headers.common.authorization = null; this.$http.headers.common['access-control-allow-headers'] = null;  this.$http.get('https://viacep.com.br/ws/' + cep + '/json')     .then(response => {         console.log(response.headers);     }); 

in vue-resource documentation, there possibility of inserting object force request configuration, documentation isn't complete.

this.$http.get('https://viacep.com.br/ws/' + cep + '/json', {    ...here... }).then(response => {     console.log(response.headers); }); 

is there way remove authorization field, or other field given request?
thanks.

* updated *

by using interceptors (as in below sample) i can edit request i can not delete particular field.

vue.http.interceptors.push((request, next) => {      const viacep = request.url.includes('viacep.com.br');      if (viacep) {         request.headers.set('authorization', 'try this');     }      next(response => {}); }); 

try delete:

vue.http.interceptors.push((request, next) => {      const viacep = request.url.includes('viacep.com.br');      if (viacep) {         request.headers.delete('authorization');     }      next(response => {}); }); 

use interceptor, inspect request, , remove header if needed.

vue.http.interceptors.push(function(request, next) {    const removeauthheaders = request.url.includes("viacep.com.br");    if (removeauthheaders){     request.headers.delete('access-control-allow-headers')     request.headers.delete('authorization')   }   else {     request.headers.set('access-control-allow-headers', <value>)     request.headers.set('authorization', <value>)   }   next(); });