Download e-book for kindle: Building Polyfills by Brandon Satrom

By Brandon Satrom

ISBN-10: 144937073X

ISBN-13: 9781449370732

Add customized beneficial properties to browsers previous and new via writing polyfill libraries, JavaScript plugins that take browsers past their local services. during this functional fieldbook, writer Brandon Satrom introduces rules and guidance for polyfill improvement, after which walks you thru the stairs for development a posh, real-world HTML5 polyfill.

You’ll additionally discover the way forward for polyfilling—or prollyfilling—that will enable you attempt and paintings with rising recommendations, frequently prior to browser owners. by the point you end this booklet, you’ll have the instruments and hands-on adventure you must construct trustworthy polyfills for today’s and tomorrow’s net.

  • Learn the present nation of polyfills, together with shims, opt-ins, and drop-ins
  • Use rules and practices to construct liable polyfills that gain the total internet improvement neighborhood
  • Build out numerous positive aspects for an HTML5 varieties polyfill library
  • Configure a construct surroundings and run automatic cross-browser trying out
  • Optimize functionality, deal with side instances, and fine-tune the rate of your polyfill
  • Get examples of prollyfilling libraries that push the bounds of the internet
  • Write a pattern prollyfill and evaluate it to present polyfill builds

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Additional resources for Building Polyfills

Example text

As noted in the preceding text, the “Color” type is intended to offer a simple “color well” control that supports visual selection of simple colors and retrieval of sRGB or hexa‐ decimal equivalents of these. There’s a lot of W3C-speak in the section, but the rules for implementing a color input type in a browser are pretty straightforward: • The value attribute of an input with a type of color is a seven character string (# and six characters for the color value) that represents a valid sRGB color.

Why not just build the UI for each input type from scratch? It’s a valid question, and in fact there are several great HTML5 Forms libraries out there that take this approach. If you’re interested in taking a look at the code required to deliver UI widgets from scratch, I encourage you to check one of these out. In our case, however, I’ve chosen to use a UI library because it allows me to focus on the process of building polyfills, which is, after all, what this book is about. By starting with a library that I can plug in, I’m able to focus on tips and tricks that are common to The HTML5 Forms Polyfill | 25 all types of polyfills, without getting bogged down in the very complex specifics of building form UI by hand.

0, will garner more interest and, possibly, participation from other developers. GitHub can also generate this file for you, based on the license chosen at project creation. Though I did take the LSAT once upon a time, please note that I am not an attorney, nor do I play one on the Internet. As such, my opin‐ ions on licensing should not be confused for legal expertise. Your best bet is to consult with a legal expert before choosing an open source license. You can also visit Choose A License for more information about the dizzying array of open source licenses available.

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Building Polyfills by Brandon Satrom


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