A guide to Google's web tools

In the good old days, developers debugged by emitting messages to the command line. The introduction of dedicated debuggers accelerated the error-finding process.

Debugger work centres around breakpoints. They act as an entry point into the debugging session – if code hits them, its execution pauses. The easiest way to add a breakpoint involves the Sources tab, where you click the margin to add a blue rhomboid.

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Tam Hanna is a software consultant who specialises in the management of carrier and device manufacturer relationships, mobile application distribution and development, design and prototyping of process computers and sensors. He was a regular contributor to Web Designer magazine in previous years, and now occupies his time as the owner of Tamoggemon Software and Computer Software.