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Paragraphs

A paragraph always starts on a new line, and browsers automatically add some white space (a margin) before and after a paragraph.


HTML Symbol Entities

HTML entities were described in the previous chapter.
Many mathematical, technical, and currency symbols, are not present on a normal keyboard.
To add such symbols to an HTML page, you can use an HTML entity name.
If no entity name exists, you can use an entity number, a decimal, or hexadecimal reference. 0136067984


What is SVG?

SVG stands for Scalable Vector Graphics
SVG is used to define graphics for the Web
SVG is a W3C recommendation
The HTML svg Element
The HTML svg element is a container for SVG graphics.
SVG has several methods for drawing paths, boxes, circles, text, and graphic images.


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CSS Selectors

CSS selectors are used to "find" (or select) the HTML elements you want to style.
We can divide CSS selectors into five categories:
Simple selectors (select elements based on name, id, class)
Combinator selectors (select elements based on a specific relationship between them)
Pseudo-class selectors (select elements based on a certain state)
Pseudo-elements selectors (select and style a part of an element)
Attribute selectors (select elements based on an attribute or attribute value)


Text/Typography

Bootstrap 4 uses a default font-size of 16px, and its line-height is 1.5.
The default font-family is "Helvetica Neue", Helvetica, Arial, sans-serif.
In addition, all p elements have margin-top: 0 and margin-bottom: 1rem (16px by default). 0136067984


Dropdowns

Toggle contextual overlays for displaying lists of links and more with the Bootstrap dropdown plugin.


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Entities HTML Entities Some characters are reserved in HTML.
If you use the less than or greater than signs in your text, the browser might mix them with tags.
Character entities are used to display reserved characters in HTML.
A character entity looks like this:

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