consistent shape of the getResponseData: getResponseData (responseText, response)

//cc @ifedapoolarewaju @goto-bus-stop

hope this is ok, naming is tricky, but we were naming params differently accross docs, code and blog posts

src/plugins/XHRUpload.js

@@ -55,25 +55,25 @@ module.exports = class XHRUpload extends Plugin {
        * @property {string} statusText
        * @property {Object.<string, string>} headers
        *
-       * @param {string} responseContent the response body
-       * @param {XMLHttpRequest | respObj} responseObject the response object
+       * @param {string} responseText the response body string
+       * @param {XMLHttpRequest | respObj} response the response object (XHR or similar)
        */
-      getResponseData (responseContent, responseObject) {
-        let response = {}
+      getResponseData (responseText, response) {
+        let parsedResponse = {}
         try {
-          response = JSON.parse(responseContent)
+          parsedResponse = JSON.parse(responseText)
         } catch (err) {
           console.log(err)
         }
 
-        return response
+        return parsedResponse
       },
       /**
        *
-       * @param {string} responseContent the response body
-       * @param {XMLHttpRequest | respObj} responseObject the response object
+       * @param {string} responseText the response body string
+       * @param {XMLHttpRequest | respObj} response the response object (XHR or similar)
        */
-      getResponseError (responseContent, responseObject) {
+      getResponseError (responseText, response) {
         return new Error('Upload error')
       }
     }

website/src/docs/xhrupload.md

@@ -72,7 +72,7 @@ uppy.setFileState(otherFileID, {
 })
 ```
 
-### `getResponseData(xhr.responseText, xhr)`
+### `getResponseData(responseText, response)`
 
 When an upload has completed, Uppy will extract response data from the upload endpoint. This response data will be available on the file's `.response` property, and be emitted in the `upload-success` event:
 
@@ -96,12 +96,12 @@ By default, Uppy assumes the endpoint will return JSON. So, if `POST /upload` re
 }
 ```
 
-That object will be emitted in the `upload-success` event. Not all endpoints respond with JSON. Providing a `getResponseData` function overrides this behavior. The `xhr` parameter is the `XMLHttpRequest` instance used to upload the file.
+That object will be emitted in the `upload-success` event. Not all endpoints respond with JSON. Providing a `getResponseData` function overrides this behavior. The `response` parameter is the `XMLHttpRequest` instance used to upload the file.
 
 For example, an endpoint that responds with an XML document:
 
 ```js
-getResponseData (responseText, xhr) {
+getResponseData (responseText, response) {
   return {
     url: responseText.match(/<Location>(.*?)<\/Location>/)[1]
   }
@@ -117,10 +117,10 @@ When uploading files from remote providers such as Dropbox or Instagram, Uppy Se
  - `response.statusText` - the HTTP status text;
  - `response.headers` - an object mapping lowercase header names to their values.
 
-### `getResponseError(xhr.responseText, xhr)`
+### `getResponseError(responseText, response)`
+
+If the upload endpoint responds with a non-2xx status code, the upload is assumed to have failed. The endpoint might have responded with some information about the error, though.
 
-If the upload endpoint responds with a non-2xx status code, the upload is assumed to have failed.
-The endpoint might have responded with some information about the error, though.
 Pass in a `getResponseError` function to extract error data from the `XMLHttpRequest` instance used for the upload.
 
 For example, if the endpoint responds with a JSON object containing a `{ message }` property, this would show that message to the user: