Folder create modalを出したら、まっすぐName inputをFocusする

lib/components/modal/CreateNewFolder.js

@@ -1,4 +1,5 @@
 import React, { PropTypes } from 'react'
+import ReactDOM from 'react-dom'
 import linkState from 'boost/linkState'
 import { createFolder } from 'boost/actions'
 import store from 'boost/store'
@@ -15,6 +16,10 @@ export default class CreateNewFolder extends React.Component {
     }
   }
 
+  componentDidMount () {
+    ReactDOM.findDOMNode(this.refs.folderName).focus()
+  }
+
   handleCloseButton (e) {
     this.props.close()
   }
@@ -84,7 +89,7 @@ export default class CreateNewFolder extends React.Component {
 
         <div className='title'>Create new folder</div>
 
-        <input onKeyDown={e => this.handleKeyDown(e)} className='ipt' type='text' valueLink={this.linkState('name')} placeholder='Enter folder name'/>
+        <input ref='folderName' onKeyDown={e => this.handleKeyDown(e)} className='ipt' type='text' valueLink={this.linkState('name')} placeholder='Enter folder name'/>
         <div className='colorSelect'>
           {colorElements}
         </div>