react.js-examples/4_class-attribute.html at master · xenialaw/react.js-examples · GitHub

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<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>Class attribute example</title>
    <style>
        .red {color:red;}
    </style>
</head>
<body>
    <p>There is some restrictions in react, for example you can't use class name.</p>
    <div id="app"></div>
    <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.6.1/react.min.js" crossorigin></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/react/15.6.1/react-dom.min.js" crossorigin></script>
    <script type='text/babel'>
    function Person(){
        return (
            <div><h3 class="red">Person</h3></div>
        );
    }
    function Dog(){
        return (
            <div><h3 className="red">Dog</h3></div>
        );
    }
    var app = (
      <div>
        <Person />
        <Dog />
      </div>
    )
    ReactDOM.render(app,document.querySelector("#app"));
    </script>
</body>
</html>