Web front-end libraries

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Web Science[1]

Web framework[edit]

A web framework (WF) or web application framework (WAF) is a software framework that is designed to support the development of web applications.


Web frameworks aim to automate the overhead associated with common activities performed in web development. For example, many web frameworks provide libraries for database access, templating frameworks, and session management, and they often promote code reuse. Although they often target development of dynamic web sites, they are also applicable to static websites.[2]

Bootstrap[edit]

Bootstrap is a free and open-source front-end web framework for designing websites and web applications. It contains HTML- and CSS-based design templates for typography, forms, buttons, navigation and other interface components, as well as optional JavaScript extensions. Unlike many web frameworks, it concerns itself with front-end development only.[3]

Bootstrap is an open-source Javascript framework developed by the team at Twitter. It is a combination of HTML, CSS, and Javascript code designed to help build user interface components. Bootstrap was also programmed to support both HTML5 and CSS3.

Also it is called Front-end-framework.

I found another excellent description of bootstrap[4]. Bootstrap is a free collection of tools for creating a websites and web applications.

It contains HTML and CSS-based design templates for typography, forms, buttons, navigation and other interface components, as well as optional JavaScript extensions.

Some reasons programmers prefer Bootstrap Framework

  • Easy to get started
  • Great grid system
  • Base styling for most HTML elements(Typography,Code,Tables,Forms,Buttons,Images,Icons)
  • Extensive list of components
  • Bundled Javascript plugins
  • Pre Styled Components

Some of the components pre-styled are:

  • Dropdowns
  • Button Groups
  • Navigation Bar
  • Breadcrumbs
  • Labels & Badges
  • Alerts
  • Progress Bar

Getting started template[edit]

<!DOCTYPE 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>Bootstrap 101 Template</title>

    <!-- Bootstrap -->
    <!-- Latest compiled and minified CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.css" integrity="sha384-MCw98/SFnGE8fJT3GXwEOngsV7Zt27NXFoaoApmYm81iuXoPkFOJwJ8ERdknLPMO" crossorigin="anonymous">
</head>
  <body>
 

    <!-- Fixed navbar -->
    <nav class="navbar navbar-inverse navbar-fixed-top">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            <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="#">Bootstrap theme</a>
        </div>
        <div id="navbar" class="navbar-collapse collapse">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#about">About</a></li>
            <li><a href="#contact">Contact</a></li>
            <li class="dropdown">
              <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
              <ul class="dropdown-menu">
                <li><a href="#">Action</a></li>
                <li><a href="#">Another action</a></li>
                <li><a href="#">Something else here</a></li>
                <li role="separator" class="divider"></li>
                <li class="dropdown-header">Nav header</li>
                <li><a href="#">Separated link</a></li>
                <li><a href="#">One more separated link</a></li>
              </ul>
            </li>
          </ul>
        </div><!--/.nav-collapse -->
      </div>
    </nav>

    <div class="container theme-showcase" role="main">

      <!-- Main jumbotron for a primary marketing message or call to action -->
      <div class="jumbotron">
        <h1>Theme example</h1>
        <p>This is a template showcasing the optional theme stylesheet included in Bootstrap. Use it as a starting point to create something more unique by building on or modifying it.</p>
      </div>


      <div class="page-header">
        <h1>Buttons</h1>
      </div>
      <p>
        <button type="button" class="btn btn-lg btn-default">Default</button>
        <button type="button" class="btn btn-lg btn-primary">Primary</button>
        <button type="button" class="btn btn-lg btn-success">Success</button>
        <button type="button" class="btn btn-lg btn-info">Info</button>
        <button type="button" class="btn btn-lg btn-warning">Warning</button>
        <button type="button" class="btn btn-lg btn-danger">Danger</button>
        <button type="button" class="btn btn-lg btn-link">Link</button>
      </p>
      <p>
        <button type="button" class="btn btn-default">Default</button>
        <button type="button" class="btn btn-primary">Primary</button>
        <button type="button" class="btn btn-success">Success</button>
        <button type="button" class="btn btn-info">Info</button>
        <button type="button" class="btn btn-warning">Warning</button>
        <button type="button" class="btn btn-danger">Danger</button>
        <button type="button" class="btn btn-link">Link</button>
      </p>
      <p>
        <button type="button" class="btn btn-sm btn-default">Default</button>
        <button type="button" class="btn btn-sm btn-primary">Primary</button>
        <button type="button" class="btn btn-sm btn-success">Success</button>
        <button type="button" class="btn btn-sm btn-info">Info</button>
        <button type="button" class="btn btn-sm btn-warning">Warning</button>
        <button type="button" class="btn btn-sm btn-danger">Danger</button>
        <button type="button" class="btn btn-sm btn-link">Link</button>
      </p>
      <p>
        <button type="button" class="btn btn-xs btn-default">Default</button>
        <button type="button" class="btn btn-xs btn-primary">Primary</button>
        <button type="button" class="btn btn-xs btn-success">Success</button>
        <button type="button" class="btn btn-xs btn-info">Info</button>
        <button type="button" class="btn btn-xs btn-warning">Warning</button>
        <button type="button" class="btn btn-xs btn-danger">Danger</button>
        <button type="button" class="btn btn-xs btn-link">Link</button>
      </p>


      <div class="page-header">
        <h1>Tables</h1>
      </div>
      <div class="row">
        <div class="col-md-6">
          <table class="table">
            <thead>
              <tr>
                <th>#</th>
                <th>First Name</th>
                <th>Last Name</th>
                <th>Username</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>1</td>
                <td>Mark</td>
                <td>Otto</td>
                <td>@mdo</td>
              </tr>
              <tr>
                <td>2</td>
                <td>Jacob</td>
                <td>Thornton</td>
                <td>@fat</td>
              </tr>
              <tr>
                <td>3</td>
                <td>Larry</td>
                <td>the Bird</td>
                <td>@twitter</td>
              </tr>
            </tbody>
          </table>
        </div>
        <div class="col-md-6">
          <table class="table table-striped">
            <thead>
              <tr>
                <th>#</th>
                <th>First Name</th>
                <th>Last Name</th>
                <th>Username</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>1</td>
                <td>Mark</td>
                <td>Otto</td>
                <td>@mdo</td>
              </tr>
              <tr>
                <td>2</td>
                <td>Jacob</td>
                <td>Thornton</td>
                <td>@fat</td>
              </tr>
              <tr>
                <td>3</td>
                <td>Larry</td>
                <td>the Bird</td>
                <td>@twitter</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>

      <div class="row">
        <div class="col-md-6">
          <table class="table table-bordered">
            <thead>
              <tr>
                <th>#</th>
                <th>First Name</th>
                <th>Last Name</th>
                <th>Username</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td rowspan="2">1</td>
                <td>Mark</td>
                <td>Otto</td>
                <td>@mdo</td>
              </tr>
              <tr>
                <td>Mark</td>
                <td>Otto</td>
                <td>@TwBootstrap</td>
              </tr>
              <tr>
                <td>2</td>
                <td>Jacob</td>
                <td>Thornton</td>
                <td>@fat</td>
              </tr>
              <tr>
                <td>3</td>
                <td colspan="2">Larry the Bird</td>
                <td>@twitter</td>
              </tr>
            </tbody>
          </table>
        </div>
        <div class="col-md-6">
          <table class="table table-condensed">
            <thead>
              <tr>
                <th>#</th>
                <th>First Name</th>
                <th>Last Name</th>
                <th>Username</th>
              </tr>
            </thead>
            <tbody>
              <tr>
                <td>1</td>
                <td>Mark</td>
                <td>Otto</td>
                <td>@mdo</td>
              </tr>
              <tr>
                <td>2</td>
                <td>Jacob</td>
                <td>Thornton</td>
                <td>@fat</td>
              </tr>
              <tr>
                <td>3</td>
                <td colspan="2">Larry the Bird</td>
                <td>@twitter</td>
              </tr>
            </tbody>
          </table>
        </div>
      </div>


      <div class="page-header">
        <h1>Thumbnails</h1>
      </div>
      <img data-src="holder.js/200x200" class="img-thumbnail" alt="A generic square placeholder image with a white border around it, making it resemble a photograph taken with an old instant camera">


      <div class="page-header">
        <h1>Labels</h1>
      </div>
      <h1>
        <span class="label label-default">Default</span>
        <span class="label label-primary">Primary</span>
        <span class="label label-success">Success</span>
        <span class="label label-info">Info</span>
        <span class="label label-warning">Warning</span>
        <span class="label label-danger">Danger</span>
      </h1>
      <h2>
        <span class="label label-default">Default</span>
        <span class="label label-primary">Primary</span>
        <span class="label label-success">Success</span>
        <span class="label label-info">Info</span>
        <span class="label label-warning">Warning</span>
        <span class="label label-danger">Danger</span>
      </h2>
      <h3>
        <span class="label label-default">Default</span>
        <span class="label label-primary">Primary</span>
        <span class="label label-success">Success</span>
        <span class="label label-info">Info</span>
        <span class="label label-warning">Warning</span>
        <span class="label label-danger">Danger</span>
      </h3>
      <h4>
        <span class="label label-default">Default</span>
        <span class="label label-primary">Primary</span>
        <span class="label label-success">Success</span>
        <span class="label label-info">Info</span>
        <span class="label label-warning">Warning</span>
        <span class="label label-danger">Danger</span>
      </h4>
      <h5>
        <span class="label label-default">Default</span>
        <span class="label label-primary">Primary</span>
        <span class="label label-success">Success</span>
        <span class="label label-info">Info</span>
        <span class="label label-warning">Warning</span>
        <span class="label label-danger">Danger</span>
      </h5>
      <h6>
        <span class="label label-default">Default</span>
        <span class="label label-primary">Primary</span>
        <span class="label label-success">Success</span>
        <span class="label label-info">Info</span>
        <span class="label label-warning">Warning</span>
        <span class="label label-danger">Danger</span>
      </h6>
      <p>
        <span class="label label-default">Default</span>
        <span class="label label-primary">Primary</span>
        <span class="label label-success">Success</span>
        <span class="label label-info">Info</span>
        <span class="label label-warning">Warning</span>
        <span class="label label-danger">Danger</span>
      </p>


      <div class="page-header">
        <h1>Badges</h1>
      </div>
      <p>
        <a href="#">Inbox <span class="badge">42</span></a>
      </p>
      <ul class="nav nav-pills" role="tablist">
        <li role="presentation" class="active"><a href="#">Home <span class="badge">42</span></a></li>
        <li role="presentation"><a href="#">Profile</a></li>
        <li role="presentation"><a href="#">Messages <span class="badge">3</span></a></li>
      </ul>


      <div class="page-header">
        <h1>Dropdown menus</h1>
      </div>
      <div class="dropdown theme-dropdown clearfix">
        <a id="dropdownMenu1" href="#" class="sr-only dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
        <ul class="dropdown-menu" aria-labelledby="dropdownMenu1">
          <li class="active"><a href="#">Action</a></li>
          <li><a href="#">Another action</a></li>
          <li><a href="#">Something else here</a></li>
          <li role="separator" class="divider"></li>
          <li><a href="#">Separated link</a></li>
        </ul>
      </div>


      <div class="page-header">
        <h1>Navs</h1>
      </div>
      <ul class="nav nav-tabs" role="tablist">
        <li role="presentation" class="active"><a href="#">Home</a></li>
        <li role="presentation"><a href="#">Profile</a></li>
        <li role="presentation"><a href="#">Messages</a></li>
      </ul>
      <ul class="nav nav-pills" role="tablist">
        <li role="presentation" class="active"><a href="#">Home</a></li>
        <li role="presentation"><a href="#">Profile</a></li>
        <li role="presentation"><a href="#">Messages</a></li>
      </ul>


      <div class="page-header">
        <h1>Navbars</h1>
      </div>

      <nav class="navbar navbar-default">
        <div class="container">
          <div class="navbar-header">
            <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navbar-collapse">
              <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="#">Project name</a>
          </div>
          <div class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
              <li class="active"><a href="#">Home</a></li>
              <li><a href="#about">About</a></li>
              <li><a href="#contact">Contact</a></li>
              <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
                <ul class="dropdown-menu">
                  <li><a href="#">Action</a></li>
                  <li><a href="#">Another action</a></li>
                  <li><a href="#">Something else here</a></li>
                  <li role="separator" class="divider"></li>
                  <li class="dropdown-header">Nav header</li>
                  <li><a href="#">Separated link</a></li>
                  <li><a href="#">One more separated link</a></li>
                </ul>
              </li>
            </ul>
          </div><!--/.nav-collapse -->
        </div>
      </nav>

      <nav class="navbar navbar-inverse">
        <div class="container">
          <div class="navbar-header">
            <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target=".navbar-collapse">
              <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="#">Project name</a>
          </div>
          <div class="navbar-collapse collapse">
            <ul class="nav navbar-nav">
              <li class="active"><a href="#">Home</a></li>
              <li><a href="#about">About</a></li>
              <li><a href="#contact">Contact</a></li>
              <li class="dropdown">
                <a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Dropdown <span class="caret"></span></a>
                <ul class="dropdown-menu">
                  <li><a href="#">Action</a></li>
                  <li><a href="#">Another action</a></li>
                  <li><a href="#">Something else here</a></li>
                  <li role="separator" class="divider"></li>
                  <li class="dropdown-header">Nav header</li>
                  <li><a href="#">Separated link</a></li>
                  <li><a href="#">One more separated link</a></li>
                </ul>
              </li>
            </ul>
          </div><!--/.nav-collapse -->
        </div>
      </nav>


      <div class="page-header">
        <h1>Alerts</h1>
      </div>
      <div class="alert alert-success" role="alert">
        <strong>Well done!</strong> You successfully read this important alert message.
      </div>
      <div class="alert alert-info" role="alert">
        <strong>Heads up!</strong> This alert needs your attention, but it's not super important.
      </div>
      <div class="alert alert-warning" role="alert">
        <strong>Warning!</strong> Best check yo self, you're not looking too good.
      </div>
      <div class="alert alert-danger" role="alert">
        <strong>Oh snap!</strong> Change a few things up and try submitting again.
      </div>


      <div class="page-header">
        <h1>Progress bars</h1>
      </div>
      <div class="progress">
        <div class="progress-bar" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%;"><span class="sr-only">60% Complete</span></div>
      </div>
      <div class="progress">
        <div class="progress-bar progress-bar-success" role="progressbar" aria-valuenow="40" aria-valuemin="0" aria-valuemax="100" style="width: 40%"><span class="sr-only">40% Complete (success)</span></div>
      </div>
      <div class="progress">
        <div class="progress-bar progress-bar-info" role="progressbar" aria-valuenow="20" aria-valuemin="0" aria-valuemax="100" style="width: 20%"><span class="sr-only">20% Complete</span></div>
      </div>
      <div class="progress">
        <div class="progress-bar progress-bar-warning" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%"><span class="sr-only">60% Complete (warning)</span></div>
      </div>
      <div class="progress">
        <div class="progress-bar progress-bar-danger" role="progressbar" aria-valuenow="80" aria-valuemin="0" aria-valuemax="100" style="width: 80%"><span class="sr-only">80% Complete (danger)</span></div>
      </div>
      <div class="progress">
        <div class="progress-bar progress-bar-striped" role="progressbar" aria-valuenow="60" aria-valuemin="0" aria-valuemax="100" style="width: 60%"><span class="sr-only">60% Complete</span></div>
      </div>
      <div class="progress">
        <div class="progress-bar progress-bar-success" style="width: 35%"><span class="sr-only">35% Complete (success)</span></div>
        <div class="progress-bar progress-bar-warning" style="width: 20%"><span class="sr-only">20% Complete (warning)</span></div>
        <div class="progress-bar progress-bar-danger" style="width: 10%"><span class="sr-only">10% Complete (danger)</span></div>
      </div>


      <div class="page-header">
        <h1>List groups</h1>
      </div>
      <div class="row">
        <div class="col-sm-4">
          <ul class="list-group">
            <li class="list-group-item">Cras justo odio</li>
            <li class="list-group-item">Dapibus ac facilisis in</li>
            <li class="list-group-item">Morbi leo risus</li>
            <li class="list-group-item">Porta ac consectetur ac</li>
            <li class="list-group-item">Vestibulum at eros</li>
          </ul>
        </div><!-- /.col-sm-4 -->
        <div class="col-sm-4">
          <div class="list-group">
            <a href="#" class="list-group-item active">
              Cras justo odio
            </a>
            <a href="#" class="list-group-item">Dapibus ac facilisis in</a>
            <a href="#" class="list-group-item">Morbi leo risus</a>
            <a href="#" class="list-group-item">Porta ac consectetur ac</a>
            <a href="#" class="list-group-item">Vestibulum at eros</a>
          </div>
        </div><!-- /.col-sm-4 -->
        <div class="col-sm-4">
          <div class="list-group">
            <a href="#" class="list-group-item active">
              <h4 class="list-group-item-heading">List group item heading</h4>
              <p class="list-group-item-text">Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.</p>
            </a>
            <a href="#" class="list-group-item">
              <h4 class="list-group-item-heading">List group item heading</h4>
              <p class="list-group-item-text">Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.</p>
            </a>
            <a href="#" class="list-group-item">
              <h4 class="list-group-item-heading">List group item heading</h4>
              <p class="list-group-item-text">Donec id elit non mi porta gravida at eget metus. Maecenas sed diam eget risus varius blandit.</p>
            </a>
          </div>
        </div><!-- /.col-sm-4 -->
      </div>


      <div class="page-header">
        <h1>Panels</h1>
      </div>
      <div class="row">
        <div class="col-sm-4">
          <div class="panel panel-default">
            <div class="panel-heading">
              <h3 class="panel-title">Panel title</h3>
            </div>
            <div class="panel-body">
              Panel content
            </div>
          </div>
          <div class="panel panel-primary">
            <div class="panel-heading">
              <h3 class="panel-title">Panel title</h3>
            </div>
            <div class="panel-body">
              Panel content
            </div>
          </div>
        </div><!-- /.col-sm-4 -->
        <div class="col-sm-4">
          <div class="panel panel-success">
            <div class="panel-heading">
              <h3 class="panel-title">Panel title</h3>
            </div>
            <div class="panel-body">
              Panel content
            </div>
          </div>
          <div class="panel panel-info">
            <div class="panel-heading">
              <h3 class="panel-title">Panel title</h3>
            </div>
            <div class="panel-body">
              Panel content
            </div>
          </div>
        </div><!-- /.col-sm-4 -->
        <div class="col-sm-4">
          <div class="panel panel-warning">
            <div class="panel-heading">
              <h3 class="panel-title">Panel title</h3>
            </div>
            <div class="panel-body">
              Panel content
            </div>
          </div>
          <div class="panel panel-danger">
            <div class="panel-heading">
              <h3 class="panel-title">Panel title</h3>
            </div>
            <div class="panel-body">
              Panel content
            </div>
          </div>
        </div><!-- /.col-sm-4 -->
      </div>


      <div class="page-header">
        <h1>Wells</h1>
      </div>
      <div class="well">
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Maecenas sed diam eget risus varius blandit sit amet non magna. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Praesent commodo cursus magna, vel scelerisque nisl consectetur et. Cras mattis consectetur purus sit amet fermentum. Duis mollis, est non commodo luctus, nisi erat porttitor ligula, eget lacinia odio sem nec elit. Aenean lacinia bibendum nulla sed consectetur.</p>
      </div>


      
      
    </div> <!-- /container -->


   <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.3/umd/popper.min.js" integrity="sha384-ZMP7rVo3mIykV+2+9J3UJ46jBk0WLaUAdn689aCwoqbBJiSnjAK/l8WvCWPIPm49" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/js/bootstrap.min.js" integrity="sha384-ChfqqxuZUCnJSK3+MXmPNIyE6ZbWh2IMqE241rYiqJxyMiZ6OW/JmZQ5stwEULTy" crossorigin="anonymous"></script>
  </body>
</html>

A simple example of grids[edit]

    <div class="row">
        <div class="col-lg-12">
            <div class="alert alert-info" role="alert">
                 I'm 12 columns wide :-)
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-lg-6">
            <div class="alert alert-info" role="alert">
                I'm 6 columns wide :-)
            </div>
        </div>

        <div class="col-lg-6">
            <div class="alert alert-info" role="alert">
                I'm 6 columns wide :-)
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-lg-4">
            <div class="alert alert-info" role="alert">
                I'm 4 columns wide :-)
            </div>
        </div>

        <div class="col-lg-4">
            <div class="alert alert-info" role="alert">
                I'm 4 columns wide :-)
            </div>
        </div>

        <div class="col-lg-4">
            <div class="alert alert-info" role="alert">
                I'm 4 columns wide :-)
            </div>
        </div>
    </div>


    <div class="row">
        <div class="col-lg-3">
            <div class="alert alert-info" role="alert">
                I'm 3 columns wide :-)
            </div>
        </div>

        <div class="col-lg-3">
            <div class="alert alert-info" role="alert">
                I'm 3 columns wide :-)
            </div>
        </div>

        <div class="col-lg-3">
            <div class="alert alert-info" role="alert">
                I'm 3 columns wide :-)
            </div>
        </div>

        <div class="col-lg-3">
            <div class="alert alert-info" role="alert">
                I'm 3 columns wide :-)
            </div>
        </div>
    </div>

    <div class="row">
        <div class="col-lg-2">
            <div class="alert alert-info" role="alert">
                I'm 2 columns wide :-)
            </div>
        </div>

        <div class="col-lg-2">
            <div class="alert alert-info" role="alert">
                I'm 2 columns wide :-)
            </div>
        </div>

        <div class="col-lg-2">
            <div class="alert alert-info" role="alert">
                I'm 2 columns wide :-)
            </div>
        </div>

        <div class="col-lg-2">
            <div class="alert alert-info" role="alert">
                I'm 2 columns wide :-)
            </div>
        </div>
        <div class="col-lg-2">
            <div class="alert alert-info" role="alert">
                I'm 2 columns wide :-)
            </div>
        </div>
        <div class="col-lg-2">
            <div class="alert alert-info" role="alert">
                I'm 2 columns wide :-)
            </div>
        </div>
    </div>



Do you understand this?[edit]

Standards[edit]

  • This topic doesn't cover a specific standard, but it is something you should you know.

References[edit]

Produce a plan, simulation or model.

Give a sequence of brief answers with no explanation.

A state in which two things are able to exist or occur together without problems or conflict.

Apply knowledge or rules to put theory into practice.

Add labels to a diagram.

Give a sequence of brief answers with no explanation.