Grammer

Now let's study the grammer for react.

Usually, we write the js code and html code in a separate way. Just as below:

But react changed the way. It makes easier to write js & html tags and you can mix them together without caring about anything unless you obey the rule below:

Each time when react met <,it will compile with html tags ; If react met { ,it will compile with js.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <link rel="stylesheet" href="../js/bootstrap.css">
    <script src="../js/react.js"></script>
    <script src="../js/react-dom.js"></script>
    <script src="../js/browser.js"></script>
    <title>React02</title>
</head>
<body>
<div id="example"></div>
<script type="text/babel">
    var names = ['Alice', 'Emily', 'Kate'];

    ReactDOM.render(
            <div>
                {
                    names.map(function (name) {
                        return <div>Hello, {name}!</div>
                    })
                }
            </div>,
        document.getElementById('example')
    );
</script>
</body>
</html>

Open the browser, you will see:

Another example


var arr = [
  <h1>Hello world!</h1>,
  <h2>React is awesome</h2>,
];
ReactDOM.render(
  <div>{arr}</div>,
  document.getElementById('example')
);

posted @ 2017-08-12 16:24  judy201654321  阅读(382)  评论(0)  编辑  收藏  举报