Bootstrap Reboot - Bootstrap Tutorial


Bootstrap Reboot

  • Reboot, a collection of element-specific CSS changes in a single file. Bootstrap to provide an elegant, consistent, and simple baseline to build upon.

Bootstrap Reboot Approach

  • Here are our guidelines and reasons for choosing what to override in Reboot:
    • Update some browser default values to use rems instead of ems for scalable component spacing.
    • Avoid margin-top. Vertical margins can collapse, yielding unexpected results. More importantly though, a single direction of margin is a simpler mental model.
    • For easier scaling across device sizes, block elements should use rems for margins.
    • Keep declarations of font-related properties to a minimum, using inherit whenever possible.

Bootstrap Horizontal Rules

  • The <hr> element has been simplified. Similar to browser defaults, <hr>s are styled via border-top, have a default opacity: .25, and automatically inherit their border-color via color, including when color is set via the parent.
how-to-create-horizontal-rules-with-bootstrap

Sample Code

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet">
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
    <hr>
    <div class="text-success">
      <hr>
    </div>
    <hr class="border border-danger border-2 opacity-50">
    <hr class="border border-primary border-3 opacity-75">
  </body>
</html>

Output

bootstrap-horizontal-rule

Bootstrap Inline code

  • Bootstrap inline code refers to the use of the code element in Bootstrap to display a short piece of code or programming language syntax inline with text.
  • The code element is used to indicate that the enclosed text is code, and is typically styled in a monospace font to distinguish it from the surrounding text.

Sample Code

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet">
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
    For example, <code>&lt;section&gt;</code> should be wrapped as inline.
  </body>
</html>

Output

bootstrap-inline-code

Bootstrap Code blocks

  • <pre>s for multiple lines of code. The <pre> element is reset to remove its margin-top and use rem units for its margin-bottom.

Sample Code

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet">
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
    <pre><code>&lt;p&gt;Sample text here...&lt;/p&gt;
    &lt;p&gt;And another line of sample text here...&lt;/p&gt;
    </code></pre>
  </body>
</html>

Output

bootstrap-code-block

Bootstrap Variables

  • Variables use the <var> tag.

Sample Code

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet">
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
   <var>y</var> = <var>m</var><var>x</var> + <var>b</var>
  </body>
</html>

Output

y = mx + b

Bootstrap User input

  • Use the <kbd> to indicate input that is typically entered via keyboard.

Sample Code

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet">
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
    To switch directories, type <kbd>cd</kbd> followed by the name of the directory.<br>
    To edit settings, press <kbd><kbd>ctrl</kbd> + <kbd>,</kbd></kbd>
  </body>
</html>

Output

bootstrap-kbd-tag

Bootstrap Tables

  • An extended table to the integration with some of the most widely used CSS frameworks. It Supports Bootstrap, Semantic UI, Bulma, Material Design, Foundation

Sample Code

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet">
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
    <table>
      <caption>
        This is an example table, and this is its caption to describe the contents.
      </caption>
      <thead>
        <tr>
          <th>Table heading</th>
          <th>Table heading</th>
          <th>Table heading</th>
          <th>Table heading</th>
        </tr>
      </thead>
      <tbody>
        <tr>
          <td>Table cell</td>
          <td>Table cell</td>
          <td>Table cell</td>
          <td>Table cell</td>
        </tr>
        <tr>
          <td>Table cell</td>
          <td>Table cell</td>
          <td>Table cell</td>
          <td>Table cell</td>
        </tr>
        <tr>
          <td>Table cell</td>
          <td>Table cell</td>
          <td>Table cell</td>
          <td>Table cell</td>
        </tr>
      </tbody>
    </table>
  </body>
</html>

Output

bootstrap-table

Bootstrap Forms

  • <fieldset>s have no borders, padding, or margin so they can be easily used as wrappers for individual inputs or groups of inputs.
  • <legend>s, like fieldsets, have also been restyled to be displayed as a heading of sorts.
  • <label>s are set to display: inline-block to allow margin to be applied.
  • <input>s, <select>s, <textarea>s, and <button>s are mostly addressed by Normalize, but Reboot removes their margin and sets line-height: inherit, too.
  • <textarea>s are modified to only be resizable vertically as horizontal resizing often “breaks” page layout.
  • <button>s and <input> button elements have cursor:

Sample Code

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet">
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet">
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
        <form class="bd-example">
              <fieldset>
                <legend>Example legend</legend>
                <p>
                  <label for="input">Example input</label>
                  <input type="text" id="input" placeholder="Example input">
                </p>
                <p>
                  <label for="email">Example email</label>
                  <input type="email" id="email" placeholder="test@example.com">
                </p>
                <p>
                  <label for="tel">Example telephone</label>
                  <input type="tel" id="tel">
                </p>
                <p>
                  <label for="url">Example url</label>
                  <input type="url" id="url">
                </p>
                <p>
                  <label for="number">Example number</label>
                  <input type="number" id="number">
                </p>
                <p>
                  <label for="search">Example search</label>
                  <input type="search" id="search">
                </p>
                <p>
                  <label for="range">Example range</label>
                  <input type="range" id="range" min="0" max="10">
                </p>
                <p>
                <label for="file">Example file input</label>
                  <input type="file" id="file">
                </p>
                <p>
                  <label for="select">Example select</label>
                  <select id="select">
                    <option value="">Choose...</option>
                    <optgroup label="Option group 1">
                      <option value="">Option 1</option>
                      <option value="">Option 2</option>
                      <option value="">Option 3</option>
                    </optgroup>
                    <optgroup label="Option group 2">
                      <option value="">Option 4</option>
                      <option value="">Option 5</option>
                      <option value="">Option 6</option>
                    </optgroup>
                  </select>
                </p>
                <p>
                  <label>
                    <input type="checkbox" value="">
                    Check this checkbox
                  </label>
                </p>
                <p>
              <label>
                    <input type="radio" name="optionsRadios" id="optionsRadios1" value="option1" checked>
                    Option one is this and that
                  </label>
                 <label>
                    <input type="radio" name="optionsRadios" id="optionsRadios2" value="option2">
                    Option two is something else that's also super long to demonstrate the wrapping of these fancy form controls.
                  </label>
                  <label>
                    <input type="radio" name="optionsRadios" id="optionsRadios3" value="option3" disabled>
                    Option three is disabled
                  </label>
                </p>
                <p>
                  <label for="textarea">Example textarea</label>
                  <textarea id="textarea" rows="3"></textarea>
                </p>
                <p>
                  <label for="date">Example date</label>
                  <input type="date" id="date">
                </p>
                <p>
                  <label for="time">Example time</label>
                  <input type="time" id="time">
                </p>
                <p>
                  <label for="password">Example password</label>
                  <input type="password" id="password">
                </p>
                <p>
                  <label for="datetime-local">Example datetime-local</label>
                  <input type="datetime-local" id="datetime-local">
                </p>
                <p>
                  <label for="week">Example week</label>
                  <input type="week" id="week">
                </p>
                <p>
                  <label for="month">Example month</label>
                  <input type="month" id="month">
                </p>
                <p>
                  <label for="color">Example color</label>
                  <input type="color" id="color">
                </p>
                <p>
                  <label for="output">Example output</label>
                  <output name="result" id="output">100</output>
                </p>
                <p>
                  <button type="submit">Button submit</button>
                  <input type="submit" value="Input submit button">
                  <input type="reset" value="Input reset button">
                  <input type="button" value="Input button">
                </p>
                <p>
              <button type="submit" disabled>Button submit</button>
                  <input type="submit" value="Input submit button" disabled>
              <input type="reset" value="Input reset button" disabled>
              <input type="button" value="Input button" disabled>
             </p>
             </fieldset>
            </form>
  </body>
</html>

Output

bootstrap-form

Bootstrap Pointers on Buttons

  • Reboot includes an enhancement for role="button" to change the default cursor to pointer. Add this attribute to elements to help indicate elements are interactive. This role isn’t necessary for <button> elements, which get their own cursor change.

Sample Code

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet"/>
    <link href="https://getbootstrap.com/docs/5.2/assets/css/docs.css" rel="stylesheet"/>
    <title>Bootstrap Example</title>
    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/js/bootstrap.bundle.min.js"></script>
  </head>
  <body class="p-3 m-0 border-0 bd-example">
    <span role="button" tabindex="0">Non-button element button</span>
  </body>
</html>

Output

Non-button element button

Bootstrap Address

  • The <address> element is updated to reset the browser default font-style from italic to normal.
  • line-height is also now inherited, and margin-bottom: 1rem has been added. <address>s is for presenting contact information for the nearest ancestor

Sample Code

<!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=1.0">
  <title>Document</title>
</head>
<body>
  <h3 id="address">Address <a class="anchor-link" href="#address" aria-label="Link to this section: Address"></a></h3>
  <address>
    <strong>KaashivInfotech. </strong><br>
    3A 1st Cross treet, PH Road, <br>
    Pallavan Nagar, Maduravoya, <br>
    Chennai-600095<br>
    <abbr title="Phone">Phone:</abbr>7667668009
  </address>
</body>
</html>

Output

bootstrap-address

Bootstrap Headings and paragraphs

  • All heading elements—e.g., <h1>—and <p> are reset to have their margin-top removed. Headings have margin-bottom: .5rem added and paragraphs margin-bottom: 1rem for easy spacing.
bootstrap-header-tag

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