width xs bootstrap code example

Example 1: bootstrap screen sizes

The Bootstrap grid system has four classes:
xs (for phones - screens less than 768px wide)
sm (for tablets - screens equal to or greater than 768px wide)
md (for small laptops - screens equal to or greater than 992px wide)
lg (for laptops and desktops - screens equal to or greater than 1200px wide)

Example 2: bootstrap content fluid 2 column

<head>
<link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
</head>
<body>
<section id="contact">
<div class="container-fluid">

    <div class="row">
     <div class="col-xs-6"> map </div>
     <div class="col-xs-6"> contact form </div>
    </div>

</div>
</section>
</body>

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Css Example