How does try/catch affect a stack trace?
Catching an error preserves its stack property. If you swallow the error or throw a new one without chaining, the original trace can be lost. Rethrow with throw err or use Error cause to preserve it.
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More FAQs in JavaScript Debugging With Call Stack Traces
A snapshot of the call stack at the moment an error is thrown. It lists the active frames from the error site down to the entry point, with file names and line numbers.
Start at the top, which is where the error occurred. Walk down to see the chain of callers. The bottom entry is usually the entry point like an event handler or module load.
Because the function is anonymous, often an arrow function callback. Naming your functions produces clearer, more debuggable stack traces.
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