update to modern code style (facebook#1738)

* mv create-react-app/index.js -> create-react-app/creteReactApp.js

* update to modern code style

* var -> cosnt

* set trailing-coma to es5 for prettier

Author: tuchk4

Diff for: bin/react-scripts.js

@@ -15,36 +15,38 @@ var script = process.argv[2];
 var args = process.argv.slice(3);
 
 switch (script) {
-case 'build':
-case 'eject':
-case 'start':
-case 'test':
-  var result = spawn.sync(
-    'node',
-    [require.resolve('../scripts/' + script)].concat(args),
-    {stdio: 'inherit'}
-  );
-  if (result.signal) {
-    if (result.signal === 'SIGKILL') {
-      console.log(
-        'The build failed because the process exited too early. ' +
-        'This probably means the system ran out of memory or someone called ' +
-        '`kill -9` on the process.'
-      );
-    } else if (result.signal === 'SIGTERM') {
-      console.log(
-        'The build failed because the process exited too early. ' +
-        'Someone might have called `kill` or `killall`, or the system could ' +
-        'be shutting down.'
-      );
+  case 'build':
+  case 'eject':
+  case 'start':
+  case 'test':
+    var result = spawn.sync(
+      'node',
+      [require.resolve('../scripts/' + script)].concat(args),
+      { stdio: 'inherit' }
+    );
+    if (result.signal) {
+      if (result.signal === 'SIGKILL') {
+        console.log(
+          'The build failed because the process exited too early. ' +
+            'This probably means the system ran out of memory or someone called ' +
+            '`kill -9` on the process.'
+        );
+      } else if (result.signal === 'SIGTERM') {
+        console.log(
+          'The build failed because the process exited too early. ' +
+            'Someone might have called `kill` or `killall`, or the system could ' +
+            'be shutting down.'
+        );
+      }
+      process.exit(1);
     }
-    process.exit(1);
-  }
-  process.exit(result.status);
-  break;
-default:
-  console.log('Unknown script "' + script + '".');
-  console.log('Perhaps you need to update react-scripts?');
-  console.log('See: https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#updating-to-new-releases');
-  break;
+    process.exit(result.status);
+    break;
+  default:
+    console.log('Unknown script "' + script + '".');
+    console.log('Perhaps you need to update react-scripts?');
+    console.log(
+      'See: https://github.com/facebookincubator/create-react-app/blob/master/packages/react-scripts/template/README.md#updating-to-new-releases'
+    );
+    break;
 }

Diff for: config/env.js

@@ -12,34 +12,36 @@
 
 // Grab NODE_ENV and REACT_APP_* environment variables and prepare them to be
 // injected into the application via DefinePlugin in Webpack configuration.
-
-var REACT_APP = /^REACT_APP_/i;
+const REACT_APP = /^REACT_APP_/i;
 
 function getClientEnvironment(publicUrl) {
-  var raw = Object
-    .keys(process.env)
+  const raw = Object.keys(process.env)
     .filter(key => REACT_APP.test(key))
-    .reduce((env, key) => {
-      env[key] = process.env[key];
-      return env;
-    }, {
-      // Useful for determining whether we’re running in production mode.
-      // Most importantly, it switches React into the correct mode.
-      'NODE_ENV': process.env.NODE_ENV || 'development',
-      // Useful for resolving the correct path to static assets in `public`.
-      // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
-      // This should only be used as an escape hatch. Normally you would put
-      // images into the `src` and `import` them in code to get their paths.
-      'PUBLIC_URL': publicUrl
-    });
+    .reduce(
+      (env, key) => {
+        env[key] = process.env[key];
+        return env;
+      },
+      {
+        // Useful for determining whether we’re running in production mode.
+        // Most importantly, it switches React into the correct mode.
+        NODE_ENV: process.env.NODE_ENV || 'development',
+        // Useful for resolving the correct path to static assets in `public`.
+        // For example, <img src={process.env.PUBLIC_URL + '/img/logo.png'} />.
+        // This should only be used as an escape hatch. Normally you would put
+        // images into the `src` and `import` them in code to get their paths.
+        PUBLIC_URL: publicUrl,
+      }
+    );
   // Stringify all values so we can feed into Webpack DefinePlugin
-  var stringified = {
-    'process.env': Object
-      .keys(raw)
-      .reduce((env, key) => {
+  const stringified = {
+    'process.env': Object.keys(raw).reduce(
+      (env, key) => {
         env[key] = JSON.stringify(raw[key]);
         return env;
-      }, {})
+      },
+      {}
+    ),
   };
 
   return { raw, stringified };