JSX_Hello_World

<!DOCTYPE html>
<html>
  <head>
    <meta charset="UTF-8" />
    <title>Hello React!</title>
    <script src="https://fb.me/react-0.14.7.js"></script>
    <script src="https://fb.me/react-dom-0.14.7.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-core/5.8.23/browser.min.js"></script>
  </head>
  <body>
    <div id="example"></div>
    <script type="text/babel">
      ReactDOM.render(
        <h1>Hello, world!</h1>,
        document.getElementById('example')
      );
    </script>
  </body>
</html>

1.疑惑点

在html中使用JSX,script.type必须声明为text/babel并且引入babel-core

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