modified 02

Author: JaimeSalas

02 How to avoid blocking/README.md

@@ -16,86 +16,26 @@ $ npm install
 
 ## Steps.
 
-### 1. Open `src/js/apiWeather.js`
+### 1. Open `src/js/apiIceAndFire.js`
 
 ```diff
-var apiWeather = apiWeather || {};
-
-(function (apiWeather) {
-  apiWeather.Service = class Service {
-    constructor(apiKey = '855fb3867fa7108f3d6a43d7405878e6') {
-      this.apiKey = apiKey;
-      this.city = null;
-    }
-
-    setCity(city) {
-      this.city = city; // obj:{ name: string, id: int}
-    }
-
-    getCurrentWeather(err, callback) {
-      const url = `http://api.openweathermap.org/data/2.5/weather?q=${this.city.name}&appid=${this.apiKey}`;
-      const req = new XMLHttpRequest();
--      req.open('get', url, true);
-+      req.open('get', url, false);
-      req.send();
-      req.onload = callback;
-      req.onerror = err;
-    }
-
-    getForecastWeather(err, callback) {
-      const url = `http://api.openweathermap.org/data/2.5/forecast?q=${this.city.name}&appid=${this.apiKey}`;
-      const req = new XMLHttpRequest();
-      req.onload = callback;
-      req.onerror = err;
--      req.open('get', url, true);
-+      req.open('get', url, false);
-      req.send();
-    }
-  }
-
-})(apiWeather);
+const sendGetRequest = (req, url) => {
+-   req.open('get', url, true);
++   req.open('get', url, false);
+    req.send();
+};
 
 ```
 * This way `XHR` work SYNC.
 
 ### 2. Now if we change these values again we can watch that goes on parallel
 
-```diff apiWeather.js
-var apiWeather = apiWeather || {};
-
-(function (apiWeather) {
-  apiWeather.Service = class Service {
-    constructor(apiKey = '855fb3867fa7108f3d6a43d7405878e6') {
-      this.apiKey = apiKey;
-      this.city = null;
-    }
-
-    setCity(city) {
-      this.city = city; // obj:{ name: string, id: int}
-    }
-
-    getCurrentWeather(err, callback) {
-      const url = `http://api.openweathermap.org/data/2.5/weather?q=${this.city.name}&appid=${this.apiKey}`;
-      const req = new XMLHttpRequest();
-+      req.open('get', url, true);
--      req.open('get', url, false);
-      req.send();
-      req.onload = callback;
-      req.onerror = err;
-    }
-
-    getForecastWeather(err, callback) {
-      const url = `http://api.openweathermap.org/data/2.5/forecast?q=${this.city.name}&appid=${this.apiKey}`;
-      const req = new XMLHttpRequest();
-      req.onload = callback;
-      req.onerror = err;
-+      req.open('get', url, true);
--      req.open('get', url, false);
-      req.send();
-    }
-  }
-
-})(apiWeather);
+```diff apiIceAndFire.js
+const sendGetRequest = (req, url) => {
++   req.open('get', url, true);
+-   req.open('get', url, false);
+    req.send();
+};
 
 ```
 * Open and show results on developer tools.