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.

What is CSS?

CSS stands for Cascading Style Sheets
CSS describes how HTML elements are to be displayed on screen, paper, or in other media
CSS saves a lot of work. It can control the layout of multiple web pages all at once
External stylesheets are stored in CSS files 030930019

Design for Mobile First

Always Design for Mobile First
Mobile First means designing for mobile before designing for desktop or any other device (This will make the page display faster on smaller devices).
This means that we must make some changes in our CSS.
Instead of changing styles when the width gets smaller than 768px, we should change the design when the width gets larger than 768px. This will make our design Mobile First:


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

Screen readers

Use screen reader utilities to hide elements on all devices except screen readers. 030930019

Handling Events

Handling events with React elements is very similar to handling events on DOM elements. There are some syntax differences:
React events are named using camelCase, rather than lowercase.
With JSX you pass a function as the event handler, rather than a string.


Related Content


Grid Container To make an HTML element behave as a grid container, you have to set the display property to grid or inline-grid.
Grid containers consist of grid items, placed inside columns and rows.


List group List groups are a flexible and powerful component for displaying a series of content. Modify and extend them to support just about any content within.


What is Multimedia? Multimedia comes in many different formats. It can be almost anything you can hear or see, like images, music, sound, videos, records, films, animations, and more.
Web pages often contain multimedia elements of different types and formats.
Browser Support
The first web browsers had support for text only, limited to a single font in a single color.
Later came browsers with support for colors, fonts, images, and multimedia!
Multimedia Formats
Multimedia elements (like audio or video) are stored in media files.
The most common way to discover the type of a file, is to look at the file extension.
Multimedia files have formats and different extensions like: .wav, .mp3, .mp4, .mpg, .wmv, and .avi.
Common Video Formats
Videoformats There are many video formats out there.
The MP4, WebM, and Ogg formats are supported by HTML.
The MP4 format is recommended by YouTube.


Bootstrap Containers You learned from the previous chapter that Bootstrap requires a containing element to wrap site contents.
Containers are used to pad the content inside of them, and there are two container classes available:
The .container class provides a responsive fixed width container
The .container-fluid class provides a full width container, spanning the entire width of the viewport


List group List groups are a flexible and powerful component for displaying a series of content. Modify and extend them to support just about any content within.


Grid Layout The CSS Grid Layout Module offers a grid-based layout system, with rows and columns, making it easier to design web pages without having to use floats and positioning.