標籤：
一、程式步驟
1.用React.createClass產生組件
2.調用React.render把組件渲染到頁面中，dom的操作由react自動完成
二、代碼
<!DOCTYPE html><html lang="zh-cn"><head> <meta charset="UTF-8"> <title>Document</title></head><body> <script src="./react-0.13.2/build/react.js"></script> <script src="./react-0.13.2/build/JSXTransformer.js"></script><script type="text/jsx">var HelloWorld = React.createClass({render: function(){return <p>你好React</p>;}});React.render(<HelloWorld></HelloWorld>, document.body);</script></body></html>
運行結果：
運行後的原始碼：
<html lang="zh-cn"><head> <meta charset="UTF-8"> <title>Document</title> <script> var HelloWorld = React.createClass({ displayName: "HelloWorld", render: function() { return React.createElement("p", null, "你好React"); } }); React.render(React.createElement(HelloWorld, null), document.body); //# sourceMappingURL=data:application/json;base64,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 </script></head><body> <p data-reactid=".0">你好React</p></body></html>
第一個React程式HelloWorld
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