A robust polyfill for the `CSS.escape` utility method as defined in CSSOM.

Give me a string and I'll tell you if it's a valid npm package license string

Combines a list of arrays, returning a single array with unique values, using strict equality for comparisons.

ECMAScript AST recursive visitor

deep cloning of objects and arrays

Generates command-line usage information

Bare simple logger for NodeJS

Run a function exactly one time

A mature, feature-complete library to parse command-line options.

Translate ECDSA signatures between ASN.1/DER and JOSE-style concatenation

Strip leading whitespace from each line in a string

Port of C's wcwidth() and wcswidth()

simplified stream construction

A state machine compiler

[](https://travis-ci.org/stefanpenner/get-caller-file) [](https://ci.a

Graphical primitives for visualization, such as lines and areas.

Array#isArray for older browsers

Try to guess if your terminal supports unicode

Easy method stubber.

Opens stuff, like webpages and files and executables, cross-platform