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in Technique[技术] by (71.8m points)

javascript - React.js: Example in tutorial not working

I'm doing the React.js tutorial from http://facebook.github.io/react/docs/tutorial.html. Here are my files:

template.html:

<html>
    <head>
        <title>Hello React</title>
        <script src="http://fb.me/react-0.8.0.js"></script>
        <script src="http://fb.me/JSXTransformer-0.8.0.js"></script>
        <script src="http://code.jquery.com/jquery-1.10.0.min.js"></script>
    </head>
    <body>
        <div id="content"></div>
        <script type="text/jsx" src='tut.js'>
        </script>
    </body>
</html>

and tut.js:

/** @jsx React.DOM */

var data = [
    {author: 'Tldr', text: 'This is a comment'}
]

var CommentBox = React.createClass({
    render: function() {
        return (
            <div className='commentBox'>
                <h1>Comments</h1>
                <CommentList data={this.props.data} />
                <CommentForm />
            </div>
        )
    }
})

var CommentList = React.createClass({
    render: function() {
        var commentNodes = this.props.data.map(function(comment) {
                    return <Comment author={comment.author}>{comment.text}</Comment>
            })
        return (
            <div className='commentList'>
                {commentNodes}
            </div>
        )
    }
})

var CommentForm = React.createClass({
    render: function() {
        return (
            <div className='commentForm'>
                Hello World, I am a comment
            </div>
        )
    }
})

var Comment = React.createClass({
    render: function() {
        return (
            <div className='comment'>
                <h2 className='commentAuthor'>
                    {this.props.author}
                </h2>
                {this.props.children}
            </div>
        )
    }
})

React.renderComponent(
    <CommentBox data={data} />,
    document.getElementById('content')
)

But when I open it in the browser, I just see a blank page without any comments. What am I doing wrong?

question from:https://stackoverflow.com/questions/20904098/react-js-example-in-tutorial-not-working

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1 Reply

0 votes
by (71.8m points)

Chrome doesn't let you load file:// urls via XHR (which as mentioned elsewhere is how the in browser transform works). You have a couple options:

  • Use a different browser. I know Firefox works.
  • Start a local web server (Python ships with one, so if you have that installed it's very simple - http://www.linuxjournal.com/content/tech-tip-really-simple-http-server-python).
  • Put the script inline instead of in a separate file. That's doable for something simple like this but you'll want to try one of the other options as your code gets more complicated.

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