react question

gistfile1.txt

var List = React.createClass({
    renderList: function () {
        return this.props.items.map(function (item) {
            return <ListItem item={value} key={keyvalue.id} />;
        });
    },

    render: function () {
        return <ul className="List">
                this.renderList()
            </ul>
    }
});