CSS Box Model
The CSS Box Model
In CSS, the term "box model" is used when talking about design and layout.
The CSS box model is essentially a box that wraps around every HTML element.
It consists of: content, padding, borders and margins. The image below
illustrates the box model:
Explanation of the different parts:
Content - The content of the box, where text and images appear
Padding - Clears an area around the content. The padding is transparent
Border - A border that goes around the padding and content
Margin - Clears an area outside the border. The margin is transparent
The box model allows us to add a border around elements, and to define space
between elements.
<!DOCTYPE html>
<html>
<head>
<style>
div {
background-color: lightgrey;
width: 300px;
border: 15px solid green;
padding: 50px;
margin: 20px;
}
</style>
</head>
<body>
<h2>Demonstrating the Box Model</h2>
<p>The CSS box model is essentially a box that wraps around every HTML
element. It consists of: borders, padding, margins, and the actual
content.</p>
<div>This text is the content of the box. We have added a 50px padding,
20px margin and a 15px green border. Ut enim ad minim veniam, quis
nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse
cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non
proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</div>
</body>
</html>
Demonstrating the Box Model
The CSS box model is essentially a box that wraps around every HTML element. It
consists of: borders, padding, margins, and the actual content.
CSS Borders
The CSS border properties allow you to specify the style, width, and color of
an element's border.
<!DOCTYPE html>
<html>
<head>
<style>
p.dotted {border-style: dotted;}
p.dashed {border-style: dashed;}
p.solid {border-style: solid;}
p.double {border-style: double;}
p.groove {border-style: groove;}
p.ridge {border-style: ridge;}
p.inset {border-style: inset;}
p.outset {border-style: outset;}
p.none {border-style: none;}
p.hidden {border-style: hidden;}
p.mix {border-style: dotted dashed solid double;}
</style>
</head>
<body>
<h2>The border-style Property</h2>
<p>This property specifies what kind of border to display:</p>
<p class="dotted">A dotted border.</p>
<p class="dashed">A dashed border.</p>
<p class="solid">A solid border.</p>
<p class="double">A double border.</p>
<p class="groove">A groove border.</p>
<p class="ridge">A ridge border.</p>
<p class="inset">An inset border.</p>
<p class="outset">An outset border.</p>
<p class="none">No border.</p>
<p class="hidden">A hidden border.</p>
<p class="mix">A mixed border.</p>
</body>
</html>
output
The border-style Property
This property specifies what kind of border to display:
A dotted border.
A dashed border.
A solid border.
A double border.
A groove border.
A ridge border.
An inset border.
An outset border.
No border.
A hidden border.
A mixed border.
CSS Padding
The CSS padding properties are used to generate space around an element's
content, inside of any defined borders.
With CSS, you have full control over the padding. There are properties for
setting the padding for each side of an element (top, right, bottom, and left).
<!DOCTYPE html>
<html>
<head>
<style>
div {
border: 1px solid black;
background-color: lightblue;
padding-top: 50px;
padding-right: 30px;
padding-bottom: 50px;
padding-left: 80px;
</style>
</head>
<body>
<h2>Using individual padding properties</h2>
<div>This div element has a top padding of 50px, a right padding of 30px, a bottom padding of 50px, and
a left padding of 80px.</div>
</body>
</html>
CSS Margins
Margins are used to create space around elements, outside of any defined
borders.
With CSS, you have full control over the margins. There are properties for
setting the margin for each side of an element (top, right, bottom, and left).
<!DOCTYPE html>
<html>
<head>
<style>
div {
border: 1px solid black;
margin-top: 100px;
margin-bottom: 100px;
margin-right: 150px;
margin-left: 80px;
background-color: lightblue;
</style>
</head>
<body>
<h2>Using individual margin properties</h2>
<div>This div element has a top margin of 100px, a right margin of 150px, a bottom margin of 100px,
and a left margin of 80px.</div>
</body>
</html>
CSS Layout - The
position Property
The position property specifies the type of positioning method used for an
element (static, relative, fixed, absolute or sticky).
The position Property
The position property specifies the type of positioning method used for an
element.
There are five different position values:
static
relative
fixed
absolute
sticky
Elements are then positioned using the top, bottom, left, and right properties.
However, these properties will not work unless the position property is set first.
They also work differently depending on the position value.
position: static;
HTML elements are positioned static by default.
Static positioned elements are not affected by the top, bottom, left, and right
properties.
An element with position: static; is not positioned in any special way; it is
always positioned according to the normal flow of the page:
This <div> element has position: static;
Here is the CSS that is used:
<!DOCTYPE html>
<html>
<head>
<style>
div.static {
position: static;
border: 3px solid #73AD21;
</style>
</head>
<body>
<h2>position: static;</h2>
<p>An element with position: static; is not positioned in any special way; it is always positioned
according to the normal flow of the page:</p>
<div class="static">
This div element has position: static;
</div>
</body>
</html>
Bootstrap Introduction
https://www.geeksforgeeks.org/bootstrap-4-introduction/
<!doctype html>
<html lang="en">
<head>
<!-- Required meta tags -->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<!-- Bootstrap CSS -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css"
rel="stylesheet"
integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCO
mLASjC" crossorigin="anonymous">
<title>Hello, world!</title>
</head>
<body>
<h1>Hello, world!</h1>
<!-- Optional JavaScript; choose one of the two! -->
<!-- Option 1: Bootstrap Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/
tWtIaxVXM" crossorigin="anonymous"></script>
<!-- Option 2: Separate Popper and Bootstrap JS -->
<!--
<script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.9.2/dist/umd/popper.min.js"
integrity="sha384-
IQsoLXl5PILFhosVNubq5LC7Qb9DXgDA9i+tQ8Zj3iwWAwPtgFTxbJ8NT4GN1R8p"
crossorigin="anonymous"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.min.js"
integrity="sha384-cVKIPhGWiC2Al4u+LWgxfKTRIcfu0JTxR+EQDz/bgldoEyl4H0zUF0QKbrJ0Ec
QF" crossorigin="anonymous"></script>
-->
</body>
</html>
