1-Implemented basic view for calculator.

.gitignore

@@ -19,3 +19,4 @@
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+.idea

README.md

@@ -1863,7 +1863,7 @@ If your production web server does not support HTTPS, then the service worker
 registration will fail, but the rest of your web app will remain functional.
 
 1. Service workers are [not currently supported](https://jakearchibald.github.io/isserviceworkerready/)
-in all web browsers. Service worker registration [won't be attempted](src/registerServiceWorker.js)
+in all web browsers. Service worker registration [won't be attempted](src/js/registerServiceWorker.js)
 on browsers that lack support.
 
 1. The service worker is only enabled in the [production environment](#deployment),
@@ -1897,7 +1897,7 @@ app works offline!" message) and also let them know when the service worker has
 fetched the latest updates that will be available the next time they load the
 page (showing a "New content is available; please refresh." message). Showing
 this messages is currently left as an exercise to the developer, but as a
-starting point, you can make use of the logic included in [`src/registerServiceWorker.js`](src/registerServiceWorker.js), which
+starting point, you can make use of the logic included in [`src/registerServiceWorker.js`](src/js/registerServiceWorker.js), which
 demonstrates which service worker lifecycle events to listen for to detect each
 scenario, and which as a default, just logs appropriate messages to the
 JavaScript console.

package.json

@@ -5,6 +5,7 @@
   "dependencies": {
     "react": "^16.5.0",
     "react-dom": "^16.5.0",
+    "react-router-dom": "^4.3.1",
     "react-scripts": "1.1.5"
   },
   "scripts": {
@@ -13,4 +14,4 @@
     "test": "react-scripts test --env=jsdom",
     "eject": "react-scripts eject"
   }
-}
+}

src/css/Button.css

@@ -0,0 +1,31 @@
+.square {
+    background: #fff;
+    border: 1px solid #999;
+    float: left;
+    font-size: 30px;
+    font-weight: bold;
+    line-height: 68px;
+    height: 68px;
+    margin-right: -1px;
+    margin-top: -1px;
+    padding: 0;
+    text-align: center;
+    width: 68px;
+}
+
+.square:focus {
+    outline: none;
+}
+
+.digit {
+    color: black;
+}
+
+.operation {
+    color: white;
+    background-color: salmon;
+}
+
+.double {
+    width: 136px;
+}

src/css/Screen.css

@@ -0,0 +1,19 @@
+.screen {
+    background: #433437;
+    color: white;
+    border: 1px solid #999;
+    float: left;
+    font-size: 24px;
+    font-weight: bold;
+    line-height: 68px;
+    height: 68px;
+    margin-right: -1px;
+    margin-top: -1px;
+    padding-right: 10px;
+    text-align: right;
+    width: 257px;
+}
+
+.screen:focus {
+    outline: none;
+}

src/css/index.css

@@ -0,0 +1,43 @@
+body {
+  font: 14px "Century Gothic", Futura, sans-serif;
+  margin: 20px;
+}
+
+ol, ul {
+  padding-left: 30px;
+}
+
+.board-row:after {
+  clear: both;
+  content: "";
+  display: table;
+}
+
+.clear {
+  background: #fff;
+  border: 1px solid #999;
+  float: left;
+  font-size: 24px;
+  font-weight: bold;
+  line-height: 68px;
+  height: 68px;
+  margin-right: -1px;
+  margin-top: -1px;
+  padding: 0;
+  text-align: center;
+  width: 135px;
+}
+
+.clear:focus {
+  outline: none;
+}
+
+.kbd-navigation .square:focus {
+  background: #ddd;
+}
+
+.game {
+  display: flex;
+  flex-direction: row;
+}
+

src/index.js

@@ -1,8 +1,14 @@
 import React from 'react';
 import ReactDOM from 'react-dom';
-import './index.css';
-import App from './App';
-import registerServiceWorker from './registerServiceWorker';
+import './css/index.css';
+import App from './js/App';
+import { BrowserRouter } from 'react-router-dom'
+import registerServiceWorker from './js/registerServiceWorker';
+
+ReactDOM.render((
+    <BrowserRouter>
+        <App />
+    </BrowserRouter>
+), document.getElementById('root'));
 
-ReactDOM.render(<App />, document.getElementById('root'));
 registerServiceWorker();