Merge pull request #12946 from Kovensky/patch-3

Axios: give an index type to response headers

axios/axios-tests.ts

@@ -80,7 +80,11 @@ var axiosInstance = axios.create({
     timeout: 1000
 });
 
-axiosInstance.request({url: "issues/1"});
+axiosInstance.request({url: "issues/1"}).then(res => {
+    if (res.headers['content-type'].startsWith('application/json')) {
+        throw new Error('Unexpected content-type');
+    }
+});
 
 axios.all<Repository, Repository>([getRepoDetails, getRepoDetails]).then(([repo1, repo2]) => {
     var sumIds = repo1.data.id + repo2.data.id;

axios/index.d.ts

@@ -159,7 +159,7 @@ declare namespace Axios {
         /**
          * headers that the server responded with
          */
-        headers: Object;
+        headers: {[index: string]: any};
 
         /**
          * config that was provided to `axios` for the request