a hover button in react.js

[widy.guilias]

hi guys... i want to make a hover button in react.js.. so there is a button.. when the mouse in on the button(hover),the new button appears above the previous button..

this is my code so far

var Category = React.createClass({displayName: 'Category',


    render: function () {


        return (
            React.createElement("div", {className: "row"}, 


                React.createElement("h1", null, "opppopopopoppo", {onMouseEnter:React.createElement("button",null, "fhruhr")})
            )
        );
    }
}); 
React.render(React.createElement(Category), contain);