Opera Dragonfly alpha 2

New to alpha 2

We’ve listened to your feedback to make Opera Dragonfly even better. New features for alpha 2 include Command Line auto-complete, CSS editing, docked window mode, a debug menu, as well as many bug and stability fixes.

Reach breaking point step by step

Opera Dragonfly's fully featured JavaScript debugger makes building sophisticated Ajax applications easier than ever. Step through your code line by line, setting break points along the way. This allows you to make sure your application and scripts are acting as you designed them.

Debug the DOM

View source isn’t much use if you use DOM Scripting to alter the DOM. Opera Dragonfly allows you to inspect the updated DOM and all its properties. Support for editing the DOM will be added in an upcoming version.

Redefine your style

It’s not just the DOM you can inspect. Check out what CSS rules apply to which element, and what rules are inherited or set by browser defaults. Overridden rules are highlighted so you can see what styles are or aren't applied. Alpha 2 introduces CSS debugging to tweak existing properties and values, as well as a handy auto-complete feature to make editing faster and more convenient.

Spot your errors

An improved error console allows you to see, filter and log any errors in your scripts, pointing to the exact position where the error occurred. Use this in combination with the other tools to hunt down and fix your site’s bugs.