react map遍历报错

Question

map遍历出错！！！let val = ["111","222","333","444","555","666","777"];let Hear= React.createClass({        render: function() {                                        return (                <article className="hear">                     <div className="divst">                         <ul> {                             val.map(function(names){                                 return <li>{names}</li>                             })                         } </ul>                     </div>                 </article>             );         } });