Testing & DebuggingLesson 74Free preview

Node Adv. Debugging

This lesson is part of Node.js · All levels

Summary

This lesson discusses advanced debugging techniques such as using built-in inspectors, programmed breakpoints, and inspections through various transports. You'll learn to use node inspection, chrome://inspect, and inspector modules to set breakpoints from within code. This ability helps to find the cause of bugs that are difficult to see from ordinary ones. (Node.js)

Key points

Run with the node --inspect or node --inspect-brk to open the Chrome DevTools Protocol.
Chrome://inspect detects a Node process being inspected on port 9229.
The inspector module allows setBreakpoint(), Debugger.pause(), and Stepping of code.
Clauses debugger; it will stop when the process is run with --inspect.
Ps-breakpoint, step over/into/out, and watch expression help track the execution sequence.

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