The id Attribute The HTML id attribute is used to specify a unique id for an HTML element (the value must be unique within the HTML document).
Using The id Attribute
In CSS, to select an element with a specific id, write a hash (#) character, followed by the id of the element:
Buttons Use Bootstrap’s custom button styles for actions in forms, dialogs, and more with support for multiple sizes, states, and more.
It lets you compose complex UIs from small and isolated pieces of code called “components”. React has a few different kinds of components, but we’ll start with React.Component subclasses:
HTML Iframes An HTML iframe is used to display a web page within a web page.
Image replacement Swap text for background images with the image replacement class.
Using Emojis Emojis are characters from the UTF-8 character set: 😄 😍 💗
What are Emojis?
Emojis look like images, or icons, but they are not.
They are letters (characters) from the UTF-8 (Unicode) alphabet.
UTF-8 covers almost all of the characters and symbols in the world.
The HTML charset Attribute
To display an HTML page correctly, a web browser must know the character set used in the page.
This is specified in the meta tag:
Dropdowns Toggle contextual overlays for displaying lists of links and more with the Bootstrap dropdown plugin.
Conditional Rendering In React, you can create distinct components that encapsulate behavior you need. Then, you can render only some of them, depending on the state of your application.
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.
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 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.