Document how to test if a file exists

[DullReferenceException]

• Version: All
• Platform: All
• Subsystem: fs

The documentation for fs could use some work. Useful utilities like exists are being deprecated with nothing more than a note to use other operations and check the error. The problem is, there is no documentation for which errors you should expect to see. I know from experimentation that ENOENT seems to tell me that a file does not exist, but that is not documented.

If we just had a section explaining what a file system error looks like and a list of all of the codes, that would be a huge help in knowing how to properly write code for different scenarios.

[DullReferenceException]

It looks like there actually is a list here:

https://nodejs.org/api/errors.html#errors_class_system_error

So really, maybe all that is missing is links to that page.

[connium]

working on that

[bmuenzenmeyer]

Hello there.

Was looking through good first contribution issues and it seems to me that this issue can be closed, as it's referenced PR was merged long ago.