The \fBnpm\fR CLI has various mechanisms for showing different levels of information back to end-users for certain commands, configurations & environments.
The default location of the logs directory is a directory named \fB_logs\fR inside the npm cache. This can be changed with the \fBlogs-dir\fR config option.
For example, if you wanted to write all your logs to the current working directory, you could run: \fBnpm install --logs-dir=.\fR. This is especially helpful in debugging a specific \fBnpm\fR issue as you can run a command multiple times with different config values and then diff all the log files.
The \fBnpm\fR CLI began hiding the output of lifecycle scripts for \fBnpm install\fR as of \fBv7\fR. Notably, this means you will not see logs/output from packages that may be using "install scripts" to display information back to you or from your own project's scripts defined in \fBpackage.json\fR. If you'd like to change this behavior & log this output you can set \fBforeground-scripts\fR to \fBtrue\fR.
This file contains a \fBtimers\fR object where the keys are an identifier for the portion of the process being timed and the value is the number of milliseconds it took to complete.
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Sometimes it is helpful to get timing information without outputting anything to the terminal. For example, the performance might be affected by writing to the terminal. In this case you can use \fB--timing --silent\fR which will still write the timing file, but not output anything to the terminal while running.
The \fBnpm\fR CLI reads from & logs any \fBnpm-notice\fR headers that are returned from the configured registry. This mechanism can be used by third-party registries to provide useful information when network-dependent requests occur.
However, this behavior should not be relied on to keep all possible sensitive information redacted. If you are concerned about secrets in your log file or terminal output, you can use \fB--loglevel=silent\fR and \fB--logs-max=0\fR to ensure no logs are written to your terminal or filesystem.
