Book Image

Web Developer's Reference Guide

By : Joshua Johanan, Talha Khan, Ricardo Zea
Book Image

Web Developer's Reference Guide

By: Joshua Johanan, Talha Khan, Ricardo Zea

Overview of this book

This comprehensive reference guide takes you through each topic in web development and highlights the most popular and important elements of each area. Starting with HTML, you will learn key elements and attributes and how they relate to each other. Next, you will explore CSS pseudo-classes and pseudo-elements, followed by CSS properties and functions. This will introduce you to many powerful and new selectors. You will then move on to JavaScript. This section will not just introduce functions, but will provide you with an entire reference for the language and paradigms. You will discover more about three of the most popular frameworks today—Bootstrap, which builds on CSS, jQuery which builds on JavaScript, and AngularJS, which also builds on JavaScript. Finally, you will take a walk-through Node.js, which is a server-side framework that allows you to write programs in JavaScript.
Table of Contents (22 chapters)
Web Developer's Reference Guide
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
9
JavaScript Expressions, Operators, Statements, and Arrays
Index

DOCTYPE


The DOCTYPE element defines the document type of the file, as follows:

<!DOCTYPE documentType>

Attributes

The documentType attribute that you can see in the preceding code lets the browser know the type of document you will use.

Description

HTML5 has a simple document type declaration, <!DOCTYPE html>. This lets the browser know that the document is HTML5. The previous versions of HTML needed a formal definition of the version being used, but HTML5 has removed this for simplicity.

Most browsers will enforce strict adherence to the document type declared and try and figure out what it is based on looking at the document. This can lead to rendering issues, so it is recommended that you do follow the standards.

Here is an HTML5 declaration:

<!DOCTYPE html>