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HTML

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About the <head>

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Insecure Resource

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CSS

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CSS preprocessors help make authoring CSS easier. All of them offer things like variables and mixins to provide convenient abstractions.

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CSS Base

About CSS Base

It's a common practice to apply CSS to a page that styles elements such that they are consistent across all browsers. We offer two of the most popular choices: normalize.css and a reset. Or, choose Neither and nothing will be applied.

Vendor Prefixing

About Vendor Prefixing

To get the best cross-browser support, it is a common practice to apply vendor prefixes to CSS properties and values that require them to work. For instance -webkit- or -moz-.

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JavaScript

About JavaScript Preprocessors

JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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Packages

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HTML 

              
                <html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
    <title>Hello, World LiveEdu Tutorial Series </title>

    <!-- Bootstrap -->
    <link href="css/bootstrap.min.css" rel="stylesheet">


    <!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
      <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script>
      <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
    <![endif]-->
  </head>
  <body>
    <header>
      <nav class="navbar navbar-default">
  <div class="container">
    <!-- Brand and toggle get grouped for better mobile display -->
    <div class="navbar-header">
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="http://blog.livecoding.tv">LiveCoding Tutorials</a>
    </div>

    <!-- Collect the nav links, forms, and other content for toggling -->
    <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
      <ul class="nav navbar-nav">
        <li class="active"><a href="#">Home <span class="sr-only">(current)</span></a></li>
        <li><a href="#">Tutorials</a></li>
      </ul>
      <ul class="nav navbar-nav">
        <li><a href="#">About Us</a></li>
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>
    </header>
 <section>
    <div class="jumbotron">
      <div class="container">
  <h1>LiveCoding Tutorials</h1>
  <p>Learn AnyThing You Want</p>
  <p><a class="btn btn-primary btn-lg" href="#" role="button">Learn</a></p>
        <div>
</div>
        
        <div class="container">
	<div class="row">
		<div class="col-md-4">
			<span class="glyphicon glyphicon-plus" aria-hidden="true"></span>
			<h3> Learn Ruby</h3>
			<p>Ruby is a dynamic, reflective, object-oriented, general-purpose programming language. It was designed and developed in the mid-1990s by Yukihiro "Matz" Matsumoto in Japan.</p>
		</div>
		<div class="col-md-4">
			<span class="glyphicon glyphicon-glass" aria-hidden="true"></span>
			<h3>Learn Python</h3>
			<p>Python is a widely used high-level, general-purpose, interpreted, dynamic programming language.</p>
		</div>
		<div class="col-md-4">
			<span class="glyphicon glyphicon-road" aria-hidden="true"></span>
			<h3>Learn JavaScript</h3>
			<p>JavaScript ("JS" for short) is a full-fledged dynamic programming language that, when applied to an HTML document, can provide dynamic interactivity on websites.</p>
		</div>
	</div>
</div>
        </section>
    
    

    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    <!-- Include all compiled plugins (below), or include individual files as needed -->
    <script src="js/bootstrap.min.js"></script>
  </body>
</html>
!

CSS 

              
                .navbar{
  background-color: white;
  padding: 0px;
  margin: 0px;
}

.header {
  margin: 0px;
  padding: 0px;
}

.navbar-brand {
  color: green;
}

.jumbotron {
  background-color: white;
  padding: 0px;
}

.container {
  background-color: white;

}

.btn-lg {
  background-color: ;
}
!

JS
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999px

Console