Refactor to use pure function.

bikeshop_project/assets/js/components/Purpose.jsx

@@ -1,21 +1,24 @@
+import React, { PropTypes } from 'react';
 import MenuItem from 'material-ui/MenuItem';
-import React from 'react';
 import SelectField from 'material-ui/SelectField';
 
-export default class Purpose extends React.Component {
-  render() {
-    return (
+const Purpose = ({ initialValue, handleChange }) => (
   <SelectField
-        value={this.props.default}
-        onChange={this.props.handleChange.bind(this)}
+    value={initialValue}
+    onChange={handleChange}
     fullWidth
   >
-        <MenuItem value={'VOLUNTEER'} primaryText="Volunteer" caption={'Volunteer'} />
-        <MenuItem value={'FIX'} primaryText="Fix" caption={'Fix'} />
-        <MenuItem value={'WORKSHOP'} primaryText="Workshop" caption={'Workshop'} />
-        <MenuItem value={'DONATE'} primaryText="Donate" caption={'Donate'} />
-        <MenuItem value={'STAFF'} primaryText="Staff" caption={'Staff'} />
+    <MenuItem value={'VOLUNTEER'} primaryText="Volunteer" />
+    <MenuItem value={'FIX'} primaryText="Fix" />
+    <MenuItem value={'WORKSHOP'} primaryText="Workshop" />
+    <MenuItem value={'DONATE'} primaryText="Donate" />
+    <MenuItem value={'STAFF'} primaryText="Staff" />
   </SelectField>
-    );
-  }
-}
+);
+
+Purpose.propTypes = {
+  initialValue: PropTypes.string,
+  handleChange: PropTypes.func,
+};
+
+export default Purpose;

bikeshop_project/assets/js/components/SignIn.jsx

@@ -134,7 +134,7 @@ export default class SignIn extends React.Component {
           <div className="mdl-cell mdl-cell--4-col">
             <Purpose
               handleChange={this.handlePurposeChoice}
-              default={this.state.signOn.purpose}
+              initialValue={this.state.signOn.purpose}
             />
           </div>
         </div>