掌握Web组件开发：从jQuery到Polymer的实用指南 - CSDN文库

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If you are already familiar with these patterns or you would prefer to dive right into

the meat of web components, then start with Part III.

Part III, Building HTML5 Web Components

The third section provides an introduction to web components as defined by the

World Wide Web Consortium (W3C) and implemented by browsers. This section

takes the working example built in and and converts it into a fully functioning

web component.

Part IV, Testing, Building, and Deploying Components with Polymer

The fourth section covers how Google’s Polymer bridges the web component imple‐

mentation gaps in today’s browsers and provides convenient APIs for creating

extendable web components. It then guides you through converting your web compo‐

nent from Part III into a Polymer component. Finally, it shows how to package

and deploy the raw web component and the Polymerized version using different

package managers.

What This Book Isn’t

The intent of this book is not to be the definitive guide for developing web compo‐

nents across the entire spectrum of devices used to access the Internet. That would be

an impossible endeavor, for two key reasons.

First, the capabilities of the browser have increased significantly in recent years, and

the Internet has transformed from a document delivery mechanism into a quasi

application platform. This transformation has made the browser a much more robust

and feature-rich platform than I ever imagined possible back when I was using tables

to lay out pages and testing them in Netscape 4. There are now many new techniques

for achieving what would have been spectacular feats of JavaScript pixel pushing

using CSS alone. These native features continuously evolve, but are adopted at differ‐

ing rates by browser vendors. Implementation varies across browsers as well, because

browser vendors base their implementations on their own interpretations of the W3C

specifications. These features are very relevant to web component development, but

this brave new browser world is a book topic in its own right. Inclusion of this level

of detail is out of scope. While it is very relevant, it is not required for web compo‐

nent development.

Secondly, the number of device types and vendors—smartphones, tablets, phablets,

etc.—has increased significantly over the past five years. This proliferation of new

devices and manufacturers has reintroduced limitations that we assumed were issues

of the past: limited processing power, limited memory, smaller form factors, poor

network connectivity, etc. This influx of new devices has impacted web development

xiv | Preface

www.it-ebooks.info

I would also like to thank my manager, Claude Jones, for his guidance and help.

Without it, this book would not exist.

I would like to thank my coauthor Jarrod Overson for agreeing to step in and write

Part IV. If you sometimes think you’re faking it, then I am doomed, as you are defi‐

nitely a more gifted writer, speaker, and engineer than me.

Many thanks to Simon St.Laurent for hearing out my half-baked idea, and providing

the feedback that shaped it into an acceptable book proposal. Also, my editor Brian

Anderson is the most patient person I have ever known. Without him this book

would be nothing more than the inner workings of my mind without context and

would not be understood by anyone expect myself. Thank you Brian.

Finally, I would like to thank all the silent partners—the engineers who write much

better code than I ever will and have taught me innumerable lessons. They choose to

remain out of the public eye, but if you are lucky enough run across one of them in

your career—trust me, you will know it— then listen to them. It is because of these

silent partners that I am even passable at best for an engineer and that I am able to

share what little knowledge I do posses.

Jarrod Overson

None of my work would have been possible without the support and patience of my

wife, Kate Lane. For years now she has accommodated my ramblings about

JavaScript, particles, and physics simulations while always being supportive and moti‐

vating. Thank you for giving me the opportunities to speak abroad, code into the

night, and spend far too much time organizing community events. Without your

support none of what I have now would have been possible, including my two beauti‐

ful children.

Thank you Finn, for bringing so much joy into my life. All of your great ideas leave

me amazed and thrilled to be your father. Thank you Norah, for always being able to

put a smile on my face. Both of you have been my motivation to be a father and per‐

son that you can be proud of.

Finally, thank you, Jason, for thinking of me when putting this book together. You’re

one of San Diego’s best developers and it’s always an honor working with you. I hope

to be able to work with you many more times in the future.

xviii | Preface

www.it-ebooks.info

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