angularjs-tracer | A tool to re-construct valid AngularJS stacktraces

angularjs-tracer is a JavaScript library. angularjs-tracer has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

Presentation given at Seattle Angular meetup - DISCLAIMER: This started out as a tool I wrote to help me debug performance and latency of Google Cloud Console. I figured it might be useful to folks, so I've extracted it out into something that can be put out there, but it still has some rough edges. In a large and complex AngularJS application, a lot of things are happening and get scheduled to happen. Due to how the AngularJS framework is designed, stack traces captured on exceptions or when putting a breakpoint in a debugger do not accurately represent what is happening. For example, setting a breakpoint on the same place in code and triggering it via the same steps can lead to getting completely different stack traces. They may be overwhelmingly long and point to something unrelated. They may be way too short and start seemingly out of nowhere. In either case, they are lying to you. This happens due to AngularJS's use of the digest cycle and the various mechanisms it uses to schedule work for later execution. These mechanisms include $watch, $evalAsync, $applyAsync, $$postDigest, $q promises, and more. This script patches AngularJS to capture and preserve the execution context so that a complete stack trace can be re-constructed when needed, as well as provide a lot of helpful debugging information.