Fix all errors and warnings on homepage

Also onChange instead of onInput in two places!

_js/examples/timer.js

@@ -11,7 +11,10 @@ var Timer = React.createClass({\n\
     this.setState({secondsElapsed: this.state.secondsElapsed + 1});\n\
   },\n\
   componentDidMount: function() {\n\
-    setInterval(this.tick, 1000);\n\
+    this.interval = setInterval(this.tick, 1000);\n\
+  },\n\
+  componentWillUnmount: function() {\n\
+    clearInterval(this.interval);\n\
   },\n\
   render: function() {\n\
     return React.DOM.div({},\n\

_js/examples/todo.js

@@ -16,7 +16,7 @@ var TodoApp = React.createClass({\n\
   getInitialState: function() {\n\
     return {items: [], text: ''};\n\
   },\n\
-  onKey: function(e) {\n\
+  onChange: function(e) {\n\
     this.setState({text: e.target.value});\n\
   },\n\
   handleSubmit: function(e) {\n\
@@ -31,7 +31,7 @@ var TodoApp = React.createClass({\n\
         <h3>TODO</h3>\n\
         <TodoList items={this.state.items} />\n\
         <form onSubmit={this.handleSubmit}>\n\
-          <input onKeyUp={this.onKey} defaultValue={this.state.text} />\n\
+          <input onChange={this.onChange} value={this.state.text} />\n\
           <button>{'Add #' + (this.state.items.length + 1)}</button>\n\
         </form>\n\
       </div>\n\

_js/live_editor.js

@@ -24,7 +24,7 @@ var CodeMirrorEditor = React.createClass({
       matchBrackets: true,
       theme: 'solarized-light'
     });
-    this.editor.on('change', this.onChange.bind(this));
+    this.editor.on('change', this.onChange);
     this.onChange();
   },
   onChange: function() {
@@ -40,7 +40,7 @@ var CodeMirrorEditor = React.createClass({
     if (IS_MOBILE) {
       editor = <pre style={{overflow: 'scroll'}}>{this.props.codeText}</pre>;
     } else {
-      editor = <textarea ref="editor">{this.props.codeText}</textarea>;
+      editor = <textarea ref="editor" defaultValue={this.props.codeText} />;
     }
 
     return (