Catching bugs with Opera Dragonfly - RIT++ 03.04.2012

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Patrick Lauke

Technologie Design

Catching bugs with Opera Dragonfly
AN OVERVIEW OF OPERA'S DEVELOPER TOOLS

Patrick H. Lauke / RIT++ / Moscow / 3 April 2012

Opera Dragonfly
●
“HTML5 web application”
●
uses application cache (needs one-time load)
●
rapid release cycle with 3 release channels

JavaScript debugging
●
syntax errors are “simple” – throw errors
●
more insidious: logic errors
●
difficult to see what's going on inside script

What's going on?
●
throwing alerts
●
breakpoints – watches, stack, inspection
●
console API

Remote debugging
●
in Opera Dragonfly forever
●
true remote debugging (look ma', no cables)

Why emulate?
● real touch events
●
viewport
●
reacts correctly to media queries
(device-pixel-ratio, device-width, … )

my.opera.com/dragonfly/blog/style-profiler-preview

https://bitbucket.org/scope/dragonfly-stp-1/

www.opera.com/developer
pepelsbey@opera.com / patrick.lauke@opera.com

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Catching bugs with Opera Dragonfly - RIT++ 03.04.2012

1. Catching bugs with Opera Dragonfly AN OVERVIEW OF OPERA'S DEVELOPER TOOLS Patrick H. Lauke / RIT++ / Moscow / 3 April 2012

2. www.opera.com/developer/tools

3. www.opera.com/dragonfly

4. Opera Dragonfly ● “HTML5 web application” ● uses application cache (needs one-time load) ● rapid release cycle with 3 release channels

5. my.opera.com/dragonfly/blog

7. JavaScript debugging ● syntax errors are “simple” – throw errors ● more insidious: logic errors ● difficult to see what's going on inside script

8. What's going on? ● throwing alerts ● breakpoints – watches, stack, inspection ● console API

10.

11. remote debugging

12. Remote debugging ● in Opera Dragonfly forever ● true remote debugging (look ma', no cables)

13.

14.

15.

16.

17.

18.

19.

20.

21. www.opera.com/developer/tools/mobile

22.

23.

24.

25.

26.

27. Why emulate? ● real touch events ● viewport ● reacts correctly to media queries (device-pixel-ratio, device-width, … )

28. upcoming features...

29. my.opera.com/dragonfly/blog/style-profiler-preview

30.

31.

32. my.opera.com/dragonfly/blog

33. https://bitbucket.org/scope/dragonfly-stp-1/

34. www.opera.com/developer pepelsbey@opera.com / patrick.lauke@opera.com

Catching bugs with Opera Dragonfly - RIT++ 03.04.2012

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