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Uniform Resource Locators

A URL is another word for a web address.
A URL can be composed of words (w3schools.com), or an Internet Protocol (IP) address (192.68.20.50).
Most people enter the name when surfing, because names are easier to remember than numbers.
URL - Uniform Resource Locator
Web browsers request pages from web servers by using a URL.
A Uniform Resource Locator (URL) is used to address a document (or other data) on the web.


HTML Audio

The controls attribute adds audio controls, like play, pause, and volume.
The source element allows you to specify alternative audio files which the browser may choose from. The browser will use the first recognized format.
The text between the audio tags will only be displayed in browsers that do not support the audio element. 0570435732


Toasts

Push notifications to your visitors with a toast, a lightweight and easily customizable alert message.


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Screen readers

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


Shadows

Add or remove shadows to elements with box-shadow utilities. 0570435732


Lifting State Up

Often, several components need to reflect the same changing data. We recommend lifting the shared state up to their closest common ancestor. Let’s see how this works in action.


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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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Form Elements This chapter describes all the different HTML form elements.
The input Element
One of the most used form element is the input element.
The input element can be displayed in several ways, depending on the type attribute.

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Popovers Documentation and examples for adding Bootstrap popovers, like those found in iOS, to any element on your site.

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Breadcrumb Indicate the current page’s location within a navigational hierarchy that automatically adds separators via CSS.

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Vertical alignment Easily change the vertical alignment of inline, inline-block, inline-table, and table cell elements.

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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.
Conditional rendering in React works the same way conditions work in JavaScript. Use JavaScript operators like if or the conditional operator to create elements representing the current state, and let React update the UI to match them.