react js simple script does not work

Question

Im trying to learn react js by following this tutortial in youtube. My program is just a very simple html code with some react.js. I follow every single step he made but I did not get the same result as he did. Can you please tell me what is wrong in my code and why is it not working?

Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Haime Computer Shop</title>
    <link rel="stylesheet" type="text/css" href="index_css.css">
    <script src="src/js/react.min.js"></script>
    <script src="src/js/react-dom.min.js"></script>
    <script src="src/js/browser.min.js"></script>
</head>
<body>

<div class="homeLinks_dcls">
<p><a href="index.html" id="home_id"> Home</a></p>
<p><a href="aboutUs.html" id="aboutUs_id"> About Us</a></p>
<p><a href="services.html" id="services_id"> Services</a></p>
<p><a href="contactUs.html" id="contactUs_id"> Contact us</a></p>
</div>

<div id="container"></div>

<script type="text/babel">
var myReactObj = React.createClass({
  render: function(){
    return (<h2>This is a component!</h2>);
  }
});

ReactDOM.render(<myReactObj/>, document.getElementById('container'));
</script>

</body>
</html>

I can only see the "Home, About Us, Services, Contact Us" text. What I can not see is the "This is a component!" text inside the myReactObject. Thanks in advance for the help...

Thanks for the time but I just solved it. Just trying anything and it turns out that the object name should start in CAPITALIZE. — Haime Reyes
– Haime Reyes, Commented Jul 22, 2017 at 14:15

Milton Castro · Accepted Answer · 2017-07-24 20:47:25Z

The problem you are facing is because you are trying to deal with JSX syntax (javascript with html tags embedded) directly through your browser, but you need the Babel to transpile your code.

At this point, you have 2 options:

Add babel to your HTML:

JSX

<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>With Babel</title>
    <link rel="stylesheet" type="text/css" href="index_css.css">
    <script src="src/js/react.min.js"></script>
    <script src="src/js/react-dom.min.js"></script>
    <script src="src/js/browser.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.21.1/babel.min.js"></script>
</head>
<body>

<div class="homeLinks_dcls">
<p><a href="index.html" id="home_id"> Home</a></p>
<p><a href="aboutUs.html" id="aboutUs_id"> About Us</a></p>
<p><a href="services.html" id="services_id"> Services</a></p>
<p><a href="contactUs.html" id="contactUs_id"> Contact us</a></p>
</div>

<div id="container"></div>

<script type="text/babel">
var myReactObj = React.createClass({
  render: function(){
    return (<h2>This is a component!</h2>);
  }
});

ReactDOM.render(
  React.createElement(myReactObj),
  document.getElementById('container')
);

</script>

</body>
</html>

Change your code to use javascript only, as the sample below:

javascript

<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Without Babel</title>
    <link rel="stylesheet" type="text/css" href="index_css.css">
    <script src="src/js/react.min.js"></script>
    <script src="src/js/react-dom.min.js"></script>
    <script src="src/js/browser.min.js"></script>
</head>
<body>

<div class="homeLinks_dcls">
<p><a href="index.html" id="home_id"> Home</a></p>
<p><a href="aboutUs.html" id="aboutUs_id"> About Us</a></p>
<p><a href="services.html" id="services_id"> Services</a></p>
<p><a href="contactUs.html" id="contactUs_id"> Contact us</a></p>
</div>

<div id="container"></div>

<script type="text/javascript">
var myReactObj = React.createClass({
  render: function(){
    return React.createElement('h2', { }, 'This is a component!');
  }
});

ReactDOM.render(
  React.createElement(myReactObj),
  document.getElementById('container')
);

</script>

</body>
</html>

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