Rounded Corners
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Rounded Corners</h2>
<p>The .img-rounded class adds rounded corners to an image (not available in IE8):</p>
<img src="cinqueterre.jpg" class="img-rounded" alt="Cinque Terre" width="304" height="236">
</div>
</body>
</html>
Circle
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Circle</h2>
<p>The .img-circle class shapes the image to a circle (not available in IE8):</p>
<img src="cinqueterre.jpg" class="img-circle" alt="Cinque Terre" width="304" height="236">
</div>
</body>
</html>
Thumbnail
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Thumbnail</h2>
<p>The .img-thumbnail class creates a thumbnail of the image:</p>
<img src="cinqueterre.jpg" class="img-thumbnail" alt="Cinque Terre" width="304" height="236">
</div>
</body>
</html>
Responsive Images
Images come in all sizes. So do screens. Responsive images automatically adjust to fit the size of the screen.Create responsive images by adding an .img-responsive class to the <img> tag. The image will then scale nicely to the parent element.
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Image</h2>
<p>The .img-responsive class makes the image scale nicely to the parent element (resize the browser window to see the effect):</p>
<img class="img-responsive" src="img_chania.jpg" alt="Chania" width="460" height="345">
</div>
</body>
</html>
Image Gallery
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Image Gallery</h2>
<p>The .thumbnail class can be used to display an image gallery.</p>
<p>The .caption class adds proper padding and a dark grey color to text inside thumbnails.</p>
<p>Click on the images to enlarge them.</p>
<div class="row">
<div class="col-md-4">
<div class="thumbnail">
<a href="/w3images/lights.jpg" target="_blank">
<img src="/w3images/lights.jpg" alt="Lights" style="width:100%">
<div class="caption">
<p>Lorem ipsum donec id elit non mi porta gravida at eget metus.</p>
</div>
</a>
</div>
</div>
<div class="col-md-4">
<div class="thumbnail">
<a href="/w3images/nature.jpg" target="_blank">
<img src="/w3images/nature.jpg" alt="Nature" style="width:100%">
<div class="caption">
<p>Lorem ipsum donec id elit non mi porta gravida at eget metus.</p>
</div>
</a>
</div>
</div>
<div class="col-md-4">
<div class="thumbnail">
<a href="/w3images/fjords.jpg" target="_blank">
<img src="/w3images/fjords.jpg" alt="Fjords" style="width:100%">
<div class="caption">
<p>Lorem ipsum donec id elit non mi porta gravida at eget metus.</p>
</div>
</a>
</div>
</div>
</div>
</div>
</body>
</html>
Responsive Embeds
Also let videos or slideshows scale properly on any device.Classes can be applied directly to <iframe>, <embed>, <video>, and <object> elements.
The following example creates a responsive video by adding an .embed-responsive-item class to an <iframe> tag (the video will then scale nicely to the parent element).
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Responsive Embed</h2>
<p>Create a responsive video and scale it nicely to the parent element with an 16:9 aspect ratio</p>
<div class="embed-responsive embed-responsive-16by9">
<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
</div>
</body>
</html>
What is aspect ratio?
The aspect ratio of an image describes the proportional relationship between its width and its height. Two common video aspect ratios are 4:3 (the universal video format of the 20th century), and 16:9 (universal for HD television and European digital television).
The aspect ratio of an image describes the proportional relationship between its width and its height. Two common video aspect ratios are 4:3 (the universal video format of the 20th century), and 16:9 (universal for HD television and European digital television).
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Responsive Embed</h2>
<p>Create a responsive video and scale it nicely to the parent element.</p>
<h2>Aspect ratio 4:3</h2>
<div class="embed-responsive embed-responsive-4by3">
<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
<h2>Aspect ratio 16:9</h2>
<div class="embed-responsive embed-responsive-16by9">
<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<title>Bootstrap Example</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
<h2>Responsive Embed</h2>
<p>Create a responsive video and scale it nicely to the parent element.</p>
<h2>Aspect ratio 4:3</h2>
<div class="embed-responsive embed-responsive-4by3">
<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
<h2>Aspect ratio 16:9</h2>
<div class="embed-responsive embed-responsive-16by9">
<iframe class="embed-responsive-item" src="https://www.youtube.com/embed/tgbNymZ7vqY"></iframe>
</div>
</div>
</body>
</html>
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