Sergeys Html5 Css3 Quick Reference Html5 Css3 And Apis 3rd Edition

Download Sergeys Html5 Css3 Quick Reference Html5 Css3 And Apis 3rd Edition full books in PDF, epub, and Kindle. Read online Sergeys Html5 Css3 Quick Reference Html5 Css3 And Apis 3rd Edition ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

Sergey's Html5 & Css3

Author : Sergey Mavrody
Publisher : Sergey's HTML5 & CSS3
ISBN 13 : 0983386730
Total Pages : 219 pages
Book Rating : 4.9/5 (833 download)

DOWNLOAD NOW!

Book Synopsis Sergey's Html5 & Css3 by : Sergey Mavrody

Download or read book Sergey's Html5 & Css3 written by Sergey Mavrody and published by Sergey's HTML5 & CSS3. This book was released on 2012-01-09 with total page 219 pages. Available in PDF, EPUB and Kindle. Book excerpt: HTML and CSS are the most essential and fundamental web languages, which provide the foundation for the vast majority of web sites and web applications. HTML5 is on track to become the future of the web, offering simple plug-in free Rich Internet Application capabilities, easier development, and enhanced user experience. This book is an essential technical dictionary for professional web designers and developers, conveniently summarizing over 3000 pages of (X)HTML5 and CSS3 specifications and covering the most common and fundamental concepts and specs, including tags, attributes, values, objects, properties, methods, events, and APIs. TOC at glance: Intro to HTML5 Overview9 About this book9 What is HTML?10 Major HTML versions10 HTML5 10 XHTML511 CSS311 Why use HTML5 11 HTML5 advantages11 Who this book is for12 HTML5 Branding12 The logo13 The technology class icons13 2. HTML Syntax HTML document15 Basics15 Elements and Tags. Tag nesting15 Void Elements. Attributes. Boolean attribute16 XHTML5. Polyglot HTML document17 Document Type and Structure. MIME Type18 Common MIME Types19 Document Object Model (DOM)20 Semantic Elements20 Syntax Summary. General Syntax Rules21 (X)HTML5 void tag syntax22 HTML5 elements with optional tags23 Elements by Type25 Browser Compatibility Scripting. Modernizr26 HTML5 enabling scripts - Polyfills27 3. HTML5 Elements General Definitions29 Chapter Legend & Conventions29 Summary of HTML5 Elements29 HTML5 Elements29 HTML5 Browser Compatibility 65 4. Form Elements & Globals HTML5 Forms aka Web Forms 2.067 Input and Output elements67 HTML5 types and attributes67 HTML5 element70 Input Type/Attribute Matrix71 Global Attributes72 Summary72 Global Events74 HTML Event Handler Attributes74 Window74 Form75 Keyboard76 Mouse76 Media77 5. CSS3 CSS Basics. Anatomy of a CSS Rule79 Typical CSS property locations80 About CSS Properties80 CSS Cascading Priority81 CSS Properties82 CSS Box Model83 Background & Borders83 Box Model92 Font96 Marquee97 Text Formatting98 Color108 Multi-column layout108 Grid Positioning110 Flexible Box Layout112 Speech113 Table. Auto Numbering and Lists117 Animation and Transitions *118 Outline120 2D and 3D Transforms121 CSS3 'Transform' property functions 122 Generated Content for Paged Media123 Paged Media126 Image Values & Replaced Content128 Line129 Rubi134 Hyperlink Presentation136 Basic User Interface137 CSS Selector Types140 CSS3 Selectors141 HTML5 Selectors API Level 1and 2 146 CSS3 Browser Compatibility Summary 147 6. HTML5 APIs What is API149 HTML5 and Related Technologies149 Semantic Web 150 Microdata150 HTML5 + RDFa152 MathML154 WAI-ARIA155 Offline & Storage156 Web Storage156 HTTP Caching and Serving158 Indexed Database API159 Web SQL database162 Device Access163 Contacts API163 Drag and Drop165 Geolocation168 Media Capture172 File API 174 Touch Events176 Real-Time Connectivity177 Web Sockets177 Web Messaging179 Web Workers181 Multimedia and Graphics183 Audio and Video183 Canvas185 Scalable Vector Graphic190 Performance & Integration193 XMLHttpRequest193 Navigation Timing194 Browser Compatibility195

Visual Art Forms: Traditional to Digital

Author : Sergey Mavrody
Publisher : Sergey's HTML5 & CSS3
ISBN 13 : 0983386757
Total Pages : 284 pages
Book Rating : 4.9/5 (833 download)

DOWNLOAD NOW!

Book Synopsis Visual Art Forms: Traditional to Digital by : Sergey Mavrody

Download or read book Visual Art Forms: Traditional to Digital written by Sergey Mavrody and published by Sergey's HTML5 & CSS3. This book was released on with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: The visual arts are art forms that create works that are primarily visual in nature, such as ceramics, drawing, painting, sculpture, printmaking, design, crafts, photography, video, animation and architecture. These definitions should not be taken too strictly as many artistic disciplines (performing arts, conceptual art, textile arts) involve aspects of the visual arts as well as the arts of other types. Also included within the visual arts are the applied arts such as industrial design, graphic design, fashion design, interior design and decorative art. This unique monograph has over 500 images, illustrating various visualart forms using examples from a single author. The book topics include: Painting, Drawing and Sketching, Sculpture, Illustration, Film, Visual Communications, Infographics, CGI and 3-D Imaging, Interaction Design, User Interface Design, Information Architecture.

Sergey's Html5 & Css3

Author : Sergey Mavrody
Publisher :
ISBN 13 : 9780983386728
Total Pages : 220 pages
Book Rating : 4.3/5 (867 download)

DOWNLOAD NOW!

Book Synopsis Sergey's Html5 & Css3 by : Sergey Mavrody

Download or read book Sergey's Html5 & Css3 written by Sergey Mavrody and published by . This book was released on 2012 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: HTML and CSS are the most essential and fundamental Web languages. This resource is an essential technical dictionary for professional Web designers and developers, conveniently summarizing specifications and covering the most common and fundamental concepts and specs, including tags, attributes, values, objects, properties, methods, events, and APIs.

Sergey's Html5 & Css3 Quick Reference: Color Edition

Author : Sergey Mavrody
Publisher : Sergey's HTML5 & CSS3
ISBN 13 : 9780615433219
Total Pages : 194 pages
Book Rating : 4.4/5 (332 download)

DOWNLOAD NOW!

Book Synopsis Sergey's Html5 & Css3 Quick Reference: Color Edition by : Sergey Mavrody

Download or read book Sergey's Html5 & Css3 Quick Reference: Color Edition written by Sergey Mavrody and published by Sergey's HTML5 & CSS3. This book was released on 2010-12 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential technical dictionary for professional Web designers and developers, conveniently summarizing more than 3,000 pages of HTML5 and CSS3 specifications and covering the most common and fundamental concepts and specs, this edition is a one-stop resource which is comprehensive but still concise, simple, easy-to-read, and structured.

Sergey's Html5 & Css3 Quick Reference. Html5, Css3 and APIs (3rd Edition)

Author : Sergey Mavrody
Publisher :
ISBN 13 : 9780983386742
Total Pages : 220 pages
Book Rating : 4.3/5 (867 download)

DOWNLOAD NOW!

Book Synopsis Sergey's Html5 & Css3 Quick Reference. Html5, Css3 and APIs (3rd Edition) by : Sergey Mavrody

Download or read book Sergey's Html5 & Css3 Quick Reference. Html5, Css3 and APIs (3rd Edition) written by Sergey Mavrody and published by . This book was released on 2012-08 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is an essential technical dictionary for professional web designers and developers, conveniently summarizing over 3000 pages of (X)HTML5 and CSS3 specifications and covering the most common and fundamental concepts and specs, including tags, attritbutes, values, objects, properties, amethods, aevnets, and APIs.

Sergey's HTML5 and CSS3 Quick Reference

Author : Sergey Mavrody
Publisher : Sergey's HTML5 & CSS3
ISBN 13 : 9780615438917
Total Pages : 196 pages
Book Rating : 4.4/5 (389 download)

DOWNLOAD NOW!

Book Synopsis Sergey's HTML5 and CSS3 Quick Reference by : Sergey Mavrody

Download or read book Sergey's HTML5 and CSS3 Quick Reference written by Sergey Mavrody and published by Sergey's HTML5 & CSS3. This book was released on 2009-11 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: HTML and CSS are the most essential and fundamental web languages, which provide the foundation for the vast majority of web sites and web applications. HTML5 is on track to become the future of the web, offering simple plug-in free Rich Internet Application capabilities, easier development, and enhanced user experience. This book is an essential technical dictionary for professional web designers and developers, conveniently summarizing over 3000 pages of (X)HTML5 and CSS3 specifications and covering the most common and fundamental concepts and specs, including tags, attributes, values, objects, properties, methods, events, and APIs. Topics include: Introduction to HTML5 HTML5 and XTML5 syntax rules XTML5 Document semantic structure Complete reference to HTML5 Elements and Attributes including Web Forms 2.0 Global attributes and events A complete summary of CSS3 properties HTML5 APIs, including Canvas, SVG, Video, Audio, Web Workers, Web Sockets, Microdata, Geolocation, Web Storage and more. The author's goal was to create a one-stop resource reference source which is comprehensive but still concise, simple, easy-to-read, and structured. This is the world's first HTML5 reference-style book. This is also the first book with XHTML5 coverage. About the Author Sergey Mavrody has been working with web technologies since the mid-nineties, focusing on UI design and development, creative direction, information architecture, interactive media, and enterprise applications with rich data visualization and advanced UI components. Sergey holds two Master's degrees. He is also a visual artist, chess master and educator with many years experience teaching as professor at the School of the Art Institute of Chicago. Limited book excerpt is available for preview: http://html5.belisso.com/HTML5_preview.pdf

I'm Feeling Lucky

Author : Douglas Edwards
Publisher : HMH
ISBN 13 : 0547549032
Total Pages : 437 pages
Book Rating : 4.5/5 (475 download)

DOWNLOAD NOW!

Book Synopsis I'm Feeling Lucky by : Douglas Edwards

Download or read book I'm Feeling Lucky written by Douglas Edwards and published by HMH. This book was released on 2011-07-12 with total page 437 pages. Available in PDF, EPUB and Kindle. Book excerpt: A marketing director’s story of working at a startup called Google in the early days of the tech boom: “Vivid inside stories . . . Engrossing” (Ken Auletta). Douglas Edwards wasn’t an engineer or a twentysomething fresh out of school when he received a job offer from a small but growing search engine company at the tail end of the 1990s. But founders Larry Page and Sergey Brin needed staff to develop the brand identity of their brainchild, and Edwards fit the bill with his journalistic background at the San Jose Mercury News, the newspaper of Silicon Valley. It was a change of pace for Edwards, to say the least, and put him in a unique position to interact with and observe the staff as Google began its rocket ride to the top. In entertaining, self-deprecating style, he tells his story of participating in this moment of business and technology history, giving readers a chance to fully experience the bizarre mix of camaraderie and competition at this phenomenal company. Edwards, Google’s first director of marketing and brand management, describes the idiosyncratic Page and Brin, the evolution of the famously nonhierarchical structure in which every employee finds a problem to tackle and works independently, the races to develop and implement each new feature, and the many ideas that never came to pass. I’m Feeling Lucky reveals what it’s like to be “indeed lucky, sort of an accidental millionaire, a reluctant bystander in a sea of computer geniuses who changed the world. This is a rare look at what happened inside the building of the most important company of our time” (Seth Godin, author of Linchpin). “An affectionate, compulsively readable recounting of the early years (1999–2005) of Google . . . This lively, thoughtful business memoir is more entertaining than it really has any right to be, and should be required reading for startup aficionados.” —Publishers Weekly, starred review “Edwards recounts Google’s stumbles and rise with verve and humor and a generosity of spirit. He kept me turning the pages of this engrossing tale.” —Ken Auletta, author of Greed and Glory on Wall Street “Funny, revealing, and instructive, with an insider’s perspective I hadn’t seen anywhere before. I thought I had followed the Google story closely, but I realized how much I’d missed after reading—and enjoying—this book.” —James Fallows, author of China Airborne

Sergey's HTML5 & CSS3 Quick Reference

Author : Sergey Mavrody
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.:/5 (125 download)

DOWNLOAD NOW!

Book Synopsis Sergey's HTML5 & CSS3 Quick Reference by : Sergey Mavrody

Download or read book Sergey's HTML5 & CSS3 Quick Reference written by Sergey Mavrody and published by . This book was released on 2012 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

CSS Secrets

Author : Lea Verou
Publisher : "O'Reilly Media, Inc."
ISBN 13 : 1449372767
Total Pages : 516 pages
Book Rating : 4.4/5 (493 download)

DOWNLOAD NOW!

Book Synopsis CSS Secrets by : Lea Verou

Download or read book CSS Secrets written by Lea Verou and published by "O'Reilly Media, Inc.". This book was released on 2015-06-04 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this practical guide, CSS expert Lea Verou provides 47 undocumented techniques and tips to help intermediate-to advanced CSS developers devise elegant solutions to a wide range of everyday web design problems. Rather than focus on design, CSS Secrets shows you how to solve problems with code. You'll learn how to apply Lea's analytical approach to practically every CSS problem you face to attain DRY, maintainable, flexible, lightweight, and standards-compliant results. Inspired by her popular talks at over 60 international web development conferences, Lea Verou provides a wealth of information for topics including: Backgrounds and Borders Shapes Visual Effects Typography User Experience Structure and Layout Transitions and Animations

HTML5 in Action

Author : Greg Wanish
Publisher : Simon and Schuster
ISBN 13 : 1638352739
Total Pages : 693 pages
Book Rating : 4.6/5 (383 download)

DOWNLOAD NOW!

Book Synopsis HTML5 in Action by : Greg Wanish

Download or read book HTML5 in Action written by Greg Wanish and published by Simon and Schuster. This book was released on 2014-02-09 with total page 693 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary HTML5 in Action provides a complete introduction to web development using HTML5. You'll explore every aspect of the HTML5 specification through real-world examples and code samples. It's much more than just a specification reference, though. It lives up to the name HTML5 in Action by giving you the practical, hands-on guidance you'll need to use key features. About the Technology HTML5 is not a few new tags and features added to an old standard—it's the foundation of the modern web, enabling its interactive services, single-page UI, interactive games, and complex business applications. With support for standards-driven mobile app development, powerful features like local storage and WebSockets, superb audio and video APIs, and new layout options using CSS3, SVG, and Canvas, HTML5 has entered its prime time. About the Book HTML5 in Action provides a complete introduction to web development using HTML5. It explores the HTML5 specification through real-world examples and code samples. It earns the name "in Action" by giving you the practical, hands-on guidance you'll need to confidently build the sites and applications you—and your clients—have been wanting for years. This book concentrates on new HTML5 features and assumes you are familiar with standard HTML. Purchase of the print book includes a free eBook in PDF, Kindle, and ePub formats from Manning Publications. What's Inside New semantic elements and form input types Single-page application design Creating interactive graphics Mobile web apps About the Authors Rob Crowther is a web developer and blogger and the author of Manning's Hello! HTML5 & CSS3. Joe Lennon is an enterprise mobile application developer. Ash Blue builds award-winning interactive projects. Greg Wanish is an independent web and eCommerce developer. Table of Contents PART 1 INTRODUCTION HTML5: from documents to applications PART 2 BROWSER-BASED APPS Form creation: input widgets, data binding, and data validation File editing and management: rich formatting, file storage, drag and drop Messaging: communicating to and from scripts in HTML5 Mobile applications: client storage and offline execution PART 3 INTERACTIVE GRAPHICS, MEDIA, AND GAMING 2D Canvas: low-level, 2D graphics rendering SVG: responsive in-browser graphics Video and audio: playing media in the browser WebGL: 3D application development Plus 10 Appendixes

Real-World Functional Programming

Author : Tomas Petricek
Publisher : Simon and Schuster
ISBN 13 : 1638353794
Total Pages : 989 pages
Book Rating : 4.6/5 (383 download)

DOWNLOAD NOW!

Book Synopsis Real-World Functional Programming by : Tomas Petricek

Download or read book Real-World Functional Programming written by Tomas Petricek and published by Simon and Schuster. This book was released on 2009-11-30 with total page 989 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functional programming languages like F#, Erlang, and Scala are attractingattention as an efficient way to handle the new requirements for programmingmulti-processor and high-availability applications. Microsoft's new F# is a truefunctional language and C# uses functional language features for LINQ andother recent advances. Real-World Functional Programming is a unique tutorial that explores thefunctional programming model through the F# and C# languages. The clearlypresented ideas and examples teach readers how functional programming differsfrom other approaches. It explains how ideas look in F#-a functionallanguage-as well as how they can be successfully used to solve programmingproblems in C#. Readers build on what they know about .NET and learn wherea functional approach makes the most sense and how to apply it effectively inthose cases. The reader should have a good working knowledge of C#. No prior exposure toF# or functional programming is required. Purchase of the print book comes with an offer of a free PDF, ePub, and Kindle eBook from Manning. Also available is all code from the book.

Pro JavaScript Development

Author : Den Odell
Publisher : Apress
ISBN 13 : 1430262699
Total Pages : 454 pages
Book Rating : 4.4/5 (32 download)

DOWNLOAD NOW!

Book Synopsis Pro JavaScript Development by : Den Odell

Download or read book Pro JavaScript Development written by Den Odell and published by Apress. This book was released on 2014-08-28 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pro JavaScript Development is a practical guide for front-end web developers who are experienced at building web pages with HTML, CSS, and JavaScript, and now wish to advance their JavaScript skills to a higher level. You will learn how to build large, well-structured, high quality, mobile-optimized web sites and apps, using the latest supported browser APIs, language features, and tools. This book teaches and shows you in practical hands-on terms how you can: Master the performance, reliability, stability, and code manageability of your JavaScript Understand and write efficient object-oriented and prototypal code, including full understanding of the ‘this’ keyword Boost the performance of your JavaScript code Architect large web applications using common design patterns Write high quality JavaScript code and avoid the pitfalls most likely to cause errors Manage code dependencies with AMD and RequireJS Develop for mobile, build games, and set up a real-time video chat using modern APIs such as Geolocation, Canvas and WebRTC Document your code as the professionals do Write command-line and web server applications in JavaScript with Node.js, Use build tools, such as Grunt and Gulp, to automate repetitive tasks and improve your development workflow Using real-world examples and applications that you'll build yourself, Pro JavaScript Development has unique, practical content that will make you a better JavaScript developer. Become a master of the latest JavaScript coding techniques and tools, and harness its best capabilities today.

Apache Cordova 4 Programming

Author : John M. Wargo
Publisher : Pearson Education
ISBN 13 : 0134048199
Total Pages : 561 pages
Book Rating : 4.1/5 (34 download)

DOWNLOAD NOW!

Book Synopsis Apache Cordova 4 Programming by : John M. Wargo

Download or read book Apache Cordova 4 Programming written by John M. Wargo and published by Pearson Education. This book was released on 2015 with total page 561 pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Apache Cordova 4 Programming' is the complete introduction to Apache Cordova 4 and Adobe PhoneGap for experienced mobile developers. Leading Cordova expert John Wargo explains what makes Cordova so important, and shows how to install and use its newest tools, from the Cordova CLI to its native SDKs. If you're brand new to Cordova, this book will be just what you need to get started. If you're familiar with an older version, it will offer you detailed guidance and making the most of Cordova 4's powerful enhancements, as well as the core APIs you may already be using.

Beginning HTML5 and CSS3

Author : Christopher Murphy
Publisher : Apress
ISBN 13 : 143022875X
Total Pages : 615 pages
Book Rating : 4.4/5 (32 download)

DOWNLOAD NOW!

Book Synopsis Beginning HTML5 and CSS3 by : Christopher Murphy

Download or read book Beginning HTML5 and CSS3 written by Christopher Murphy and published by Apress. This book was released on 2013-01-26 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning HTML5 and CSS3 is your introduction to the new features and elements of HTML5—as a web developer you'll learn about all the leaner, cleaner, and more efficient code available now with HTML5, along with some new tools that will allow you to create more meaningful and richer content. For everyone involved in web design, this book also introduces the new structural integrity and styling flexibility of CSS 3—which means better-looking pages and smarter content in your website projects. For all forward-looking web professionals who want to start enjoying and deploying the new HTML5 and CSS3 features right away, this book provides you with an in-depth look at the new capabilities—including audio and video—that are new to web standards. You’ll learn about the new HTML5 structural sections, plus HTML5 and CSS3 layouts. You’ll also discover why some people think HTML5 is going to be a Flash killer, when you see how to create transitions and animations with these new technologies. So get ahead in your web development through the practical, step-by-step approaches offered to you in Beginning HTML5 and CSS3.

E-commerce

Author : Kenneth C. Laudon
Publisher :
ISBN 13 : 9781292109961
Total Pages : 909 pages
Book Rating : 4.1/5 (99 download)

DOWNLOAD NOW!

Book Synopsis E-commerce by : Kenneth C. Laudon

Download or read book E-commerce written by Kenneth C. Laudon and published by . This book was released on 2016 with total page 909 pages. Available in PDF, EPUB and Kindle. Book excerpt: For undergraduate and graduate courses in business. Understanding The Vast And Expanding Field of E-Commerce Laudon's E-Commerce 2016: Business, Technology, Society emphasizes three driving forces behind the expanding field of e-commerce: technology change, business development, and social issues. A conceptual framework uses the templates of many modern-day companies to further demonstrate the differences and complexities in e-commerce today. An in-depth investigation of companies such as Uber, Pinterest, and Apple kick-off the course while preparing students for real-life scenarios. In the Twelfth Edition, Laudon and Traver add new or update existing case studies to match developments in the e-commerce field as they exist in today's tech world. They built in additional video cases for each chapter, making the material even more accessible to students as they prepare for their future roles in business.

The Smashing Book

Author :
Publisher :
ISBN 13 : 9783943075380
Total Pages : 311 pages
Book Rating : 4.0/5 (753 download)

DOWNLOAD NOW!

Book Synopsis The Smashing Book by :

Download or read book The Smashing Book written by and published by . This book was released on 2011 with total page 311 pages. Available in PDF, EPUB and Kindle. Book excerpt: These eBooks are the long-awaited digital version of our bestselling printed book about best practices in modern Web design. They share valuable practical insight into design, usability and coding, provide professional advice for designing mobile applications and building successful e-commerce websites, and explain common coding mistakes and how to avoid them. You'll explore the principles of professional design thinking and graphic design and learn how to apply psychology and game theory to create engaging user experiences.

You Don't Know JS: Scope & Closures

Author : Kyle Simpson
Publisher : "O'Reilly Media, Inc."
ISBN 13 : 144933556X
Total Pages : 98 pages
Book Rating : 4.4/5 (493 download)

DOWNLOAD NOW!

Book Synopsis You Don't Know JS: Scope & Closures by : Kyle Simpson

Download or read book You Don't Know JS: Scope & Closures written by Kyle Simpson and published by "O'Reilly Media, Inc.". This book was released on 2014-03-10 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: No matter how much experience you have with JavaScript, odds are you don’t fully understand the language. This concise yet in-depth guide takes you inside scope and closures, two core concepts you need to know to become a more efficient and effective JavaScript programmer. You’ll learn how and why they work, and how an understanding of closures can be a powerful part of your development skillset. Like other books in the "You Don’t Know JS" series, Scope and Closures dives into trickier parts of the language that many JavaScript programmers simply avoid. Armed with this knowledge, you can achieve true JavaScript mastery. Learn about scope, a set of rules to help JavaScript engines locate variables in your code Go deeper into nested scope, a series of containers for variables and functions Explore function- and block-based scope, “hoisting”, and the patterns and benefits of scope-based hiding Discover how to use closures for synchronous and asynchronous tasks, including the creation of JavaScript libraries