Existence Packages

A simple wrapper around an object that will warn when you access keys that aren't defined (using the magic of ES6 Proxies)

Utility functions that emulate CoffeeScript existence operator

run useful tests on your arrays or hashes of arrays or hashes

A variable lives here

Check whether an email address exists.

Check if a value exists at a nested property path

Checks if file or directory with name given as first argument exist and returns proper exit code.

Check for the existential value of a variable/object. Assign one if the value doesn't exist.

Check for the existential value of a variable. Assign value by default.

Check if a file exists

A Node.js library to check the existence of an email address by verifying with the domain's mail exchange (MX) servers and using SMTP commands.

Test whether a path exists on the filesystem.

Test whether a path exists on the filesystem.