Lesson 06 · 9 min
process: environment, arguments, exit code
How a program learns where it's running and with which parameters.
The global process object is the link to the system. process.env holds environment variables (all values are strings or undefined). process.argv holds command-line arguments: the first two are the path to node and to the script, then come yours. process.exitCode sets the exit code: 0 means success, anything else means an error, and CI or a calling script will notice.
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