Sunday, 12 April 2015

Bootstrap



Bootstrap is the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first web sites.
What is Bootstrap?

  •  Bootstrap is a free front-end framework for faster and easier web development.
  •  Bootstrap includes HTML and CSS based design templates for typography, forms, buttons, tables, navigation, modals, image carousels and many other, as well as optional JavaScript plugins.
  • Bootstrap also gives you the ability to easily create responsive designs.


Advantages of Bootstrap:
·         Easy to use: Anybody with just basic knowledge of HTML and CSS can start using Bootstrap.
·         Responsive features: Bootstrap's responsive CSS adjusts to phones, tablets, and desktops.
·         Mobile-first approach: In Bootstrap 3, mobile-first styles are part of the core framework.
·         Browser compatibility: Bootstrap is compatible with all modern browsers (Chrome, Firefox, Internet Explorer, Safari, and Opera).

Bootstrap CDN:
If you don't want to download and host Bootstrap yourself, you can include it from a CDN (Content Delivery Network).
MaxCDN provide CDN support for Bootstrap's CSS and JavaScript. Also include jQuery:
<!-- Latest compiled and minified CSS -->
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">

<!-- jQuery library -->
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>

<!-- Latest compiled JavaScript -->
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>


One advantage of using the Bootstrap CDN:
Many users already have downloaded Bootstrap from MaxCDN when visiting another site. As a result, it will be loaded from cache when they visit your site, which leads to faster loading time. Also, most CDN's will make sure that once a user requests a file from it, it will be served from the server closest to them, which also leads to faster loading time.

Create First Web Page With Bootstrap

1. Add the HTML5 doctype
Bootstrap uses HTML elements and CSS properties that require the HTML5 doctype.
Always include the HTML5 doctype at the beginning of the page, along with the lang attribute and the correct character set:
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8"> 
  </head>
</html>

2. Bootstrap 3 is mobile-first
Bootstrap 3 is designed to be responsive to mobile devices. Mobile-first styles are part of the core framework.
To ensure proper rendering and touch zooming, add the following <meta> tag inside the <head> element:
<meta name="viewport" content="width=device-width, initial-scale=1">
The width=device-width part sets the width of the page to follow the screen-width of the device (which will vary depending on the device).
The initial-scale=1 part sets the initial zoom level when the page is first loaded by the browser.

3. Containers
Bootstrap also requires a containing element to wrap site contents.
There are two container classes to choose from:
  1. The .container class provides a responsive fixed width container
  2. The .container-fluid class provides a full width container, spanning the entire width of the viewport
Note: Containers are not nestable (you cannot put a container inside another container).

Two Basic Bootstrap Pages

The following example shows the code for a basic Bootstrap page (with a responsive fixed width container):
<!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="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
 
 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
 
 <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container" style="border:1px red solid">
 
 <h1>My First Bootstrap Page</h1>
 
 <p>This is some text.</p> 
</div>

</body>
</html>

The following example shows the code for a basic Bootstrap page (with a full width container):
<!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="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
  <script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container-fluid" style="border:1px red solid">
  <h1>My First Bootstrap Page</h1>
  <p>This is some text.</p>
</div>

</body>
</html>
 





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