Opera发布了Dragonfly的alpha版本，这是一个类似firefox firebug的web开发工具。
Dragonfly能够调试javascript，查看CSS和DOM，显示任何网页的错误，Dragonfly让开发工程师无论是在计算机上还是手机上通过Opera调试网页更加简单。
详细功能包括：
1。可以设置断点，单步调试javascript。
2。能够检查每一个元素上的CSS规则，编辑改进CSS。
3。显示网页错误，改进的错误控制帮助你查看，过滤和跟踪任何scripts错误。
4。调试和查看DOM代码。
这样一个好工具，去看看吧，说说你的看法？
http://www.opera.com/products/dragonfly/
Reach breaking point step by step
OperaDragonfly's fully featured JavaScript debugger makes buildingsophisticated Ajax applications easier than ever. Step through yourcode line by line, setting break points along the way. This allows youto make sure your application and scripts are acting as you designedthem.
Redefine your style
Itsnot just the DOM you can inspect. Check out what CSS rules apply towhich element, and what rules are inherited or set by browser defaults.Overridden rules are highlighted so you can see what styles are oraren't applied. Support for editing CSS rules will be added in anupcoming version.
Think open and freeBuilt using theopen web standards you know and love, Opera Dragonfly’s source isavailable to view. Not only that, but it is released on a open sourceBSD license, meaning it is free as in freedom as well as in beer.
Always up to dateOperaDragonfly is a new breed of hybrid application. Part desktopapplication, part web application, it resides in local persistentstorage, yet instantly updates when a new version is released – justlike your favorite web sites. You never have to check for updates orinstall a new version.
Debug your phone or TVDebug pageswhether they are on your computer or a supported device, such as aWindows Mobile phone running Opera Mobile 9.5. You can connect to anydevice running Presto Core-2.1 or above, and debug using yourcomputer’s screen and keyboard – no need to struggle inputting testdata with your phone’s keypad again.
Spot your errors
Animproved error console allows you to see, filter and log any errors inyour scripts, pointing to the exact position the error occurred. Usethis in combination with the other tools to hunt down and fix yoursite’s bugs.
Debug the DOM
Viewsource isn’t much use if you use DOM Scripting to alter the DOM. OperaDragonfly allows you to inspect the updated DOM and all it'sproperties. Support for editing the DOM will be added in an upcomingversion.
Coming soonThe initial alpha release is justthe beginning. Opera Dragonfly has a fully featured road map, includingsupport for editing of CSS, JavaScript and the DOM, a single windowmode, improved JavaScript thread handling, XHR and HTTP monitoring,improved keyboard navigation, and translation into a number oflanguages.
Screenshots
下载http://www.opera.com/download/index.dml?ver=9.50b2&platform=windows
