replaced most let -> const to protect the code from side effects

Author: hipertracker

src/app/components/App.js

@@ -2,12 +2,12 @@ const React = require('react');
 const ReactRouter = require('react-router');
 const {Menu, Segment} = require('react-semantify');
 
-let RouteHandler = ReactRouter.RouteHandler;
-let Link = ReactRouter.Link;
+const RouteHandler = ReactRouter.RouteHandler;
+const Link = ReactRouter.Link;
 
 const App = React.createClass({
     render() {
-        let styles = {
+        const styles = {
             margin: 10
         };
         return (

src/app/components/UsefulLinks.js

@@ -26,13 +26,13 @@ const UsefulLinks = React.createClass({
         if (!this.state.links.length) {
             return <span/>;
         }
-        let styles = {
+        const styles = {
             item: {
                 paddingLeft: 30
             }
         };
-        let style = m(styles.item, this.props.style);
-        let items = this.state.links.map((item, key) =>
+        const style = m(styles.item, this.props.style);
+        const items = this.state.links.map((item, key) =>
             <li key={key}>
             {item.title} (<a href={item.url} target="_blank">{item.url}</a>)
             </li>);

src/app/lib/tools.js

@@ -1,5 +1,5 @@
-let React = require('react');
-let _ = require('lodash');
+const React = require('react');
+const _ = require('lodash');
 
 // mounting a React component to a selector id location
 export function mount(component, location, argv = {}) {
@@ -8,12 +8,8 @@ export function mount(component, location, argv = {}) {
     } else {
         location = document.getElementById(location);
     }
-    console.log('@argv', argv);
-    console.log('@1', component);
     if (!React.isValidElement(component)) {
-        console.log('@2', component);
         component = React.createFactory(component);
-        console.log('@3', component);
     }
     React.render(component(argv), location);
 };

src/index.js

@@ -1,4 +1,4 @@
-let React = require('react');
+const React = require('react');
 import {mount} from './app/lib/tools';
 
 // For mounting App component into <section id="app"></section> use:
@@ -12,11 +12,11 @@ import App from './app/components/App';
 import Home from './app/components/Home';
 import About from './app/components/About';
 
-let Router = require('react-router');
-let Route = Router.Route;
-let DefaultRoute = Router.DefaultRoute;
+const Router = require('react-router');
+const Route = Router.Route;
+const DefaultRoute = Router.DefaultRoute;
 
-let routes = (
+const routes = (
     <Route name="app" path="/" handler={App}>
         <Route name="home" handler={Home}/>
         <Route name="about" handler={About}/>