The document discusses using Zepto.js, a lightweight jQuery-compatible JavaScript library, to create a mobile version of a website called ingatlan.com. It notes that Zepto.js is much smaller than jQuery and handles touch events well for mobile. However, early versions of Zepto.js lacked documentation and did not fully replicate jQuery's functionality. But more recently, Zepto.js has improved with new releases, adding documentation and becoming more compatible with jQuery. Additionally, other mobile JavaScript libraries have emerged as alternatives to Zepto.js and jQuery.

1. goes mobile
Bártházi András
Arkon Zrt.

2. Bártházi András
• IT research and PR guy at Arkon Zrt.
(the creators of ingatlan.com & koponyeg.hu)
• @ba78 on Twitter
• blogs at Weblabor.hu, Webakademia.hu

3. July 2011
Source: http://www.flickr.com/photos/icyaero-photography/5800568820/

4. let’s do a mobile view
• we’ve done it in last July
• today’s landscape of choices is different,
I’ll talk about that as well

5. the idea
• a basic mobile view for ingatlan.com
• our “main site” is using jQuery
• jQuery is “too big” for mobile
development
• we don’t want to maintain a new code

6. Zepto.js?
• a jQuery compatible, mobile JS library
• Zepto v0.5-v0.6:
31k, 14k minified, 5k minified+gzipped vs.
jQuery 1.4.3:
180k, 78k minified, 27kb minified+gzipped
• sounds good, but not worked as a drop-in
replacement

7. documentation?
• unfortunately Zepto.js had no
documentation
• fortunately the code is small and
easy to read

8. .querySelector()
• jQuery is using the Sizzle selector engine
• Zepto.js is working with querySelector()
• jQuery’s :visible selector is not part of the
CSS specification, so not working with
querySelector()

9. .click()
• jQuery has a .click() eventhandler
• Zepto had only the general .bind()

10. $.inArray(), $.each()...
• jQuery has some great utility functions
• Zepto have not implemented them

11. Touch
• Zepto focuses on mobile,
handles touch events <3

12. Summary, the good news
• had to work on it, but Zepto.js seems to
be a working, recommandable solution

13. And these days...
Source: http://www.flickr.com/photos/bensonkua/5738557548/

14. ... and today, even better news
• Zepto.js improved a lot, v1.0rc1 have
been released yesterday
• a new site with a good documentation
• much-much compatible with jQuery
• also with experimental support
for :visible and so

15. ... and not the only one
• new players arrived as well:
• jQ.Mobi - even smaller than Zepto
• jquip - a modularized jQuery

16. Source: http://www.flickr.com/photos/theilluminated/5386099858/