JSPM

Test whether a path exists on the filesystem.

Checks existence of email addresses

The missing existential operator for JavaScript. Returns true unless a variable is null or undefined

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

Checks existence of E-Mail DNS MX records.

Check whether an email address exists.

Stimulus controller to remove elements from the dom, and be notified with an event when they are added.

Check if an SMTP server accepts emails to a given address.

Tests whether a path exists on the filesystem.

A library written in Typescript which tries to check if an email address really exists

A monadic wrapper for dealing with existence

Message-based duck typing system focused on behavioral roles instead of structural types.

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.

Check if a file exists

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.

All things created by God

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

Checks existence of email addresses

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

Check if a GitHub repo exists

CLI to Check if a GitHub repo exists

Utility functions that emulate CoffeeScript existence operator

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

Checks existence of email addressesi including MX, telnet and regex validation

Test whether a path exists on the filesystem.

A variable lives here

Check whether an email address exists.

API Client for Proof of Existence

Verify email address by checking MX records and SMTP connection.