Opera Software has embedded into its Web browser a beta set of tools, collectively called Dragonfly, that can help developers find errors in their complex Web pages, the company announced Monday.

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Whether you’re a Web designer or a JavaScript programmer, Firebug provides invaluable tools for debugging websites. For Web developers like me, one of the most burning questions is “why does the page ...

For the first time, developers using Visual Studio Code can debug iOS mobile Web apps directly from the code editor on Windows machines. Previously, debugging the JavaScript code powering these apps ...