Have your arguments, and validate it too. -- Slick arguments validator for all your js functions.

TypeScript definitions for functions-have-names

Make a synchronous function have a timeout

Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.

Does the current environment have `import()` support?

Checks if two geometries have no overlapping areas.

A modest JavaScript framework for the HTML you already have.

Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?

Tells you whether or not dependencies in package.json have been changed.

Does this JS environment support the `name` property on functions?

Does a JS type have a property

Does a JS type's prototype have a property

copy form react-color, but only have SketchColor

Does a JS type have a getter/setter property

Synchronous Readline for interactively running to have a conversation with the user via a console(TTY).

A module used internally by Jest to check which files have changed since you last committed in git or hg.

A library to have a generic typescript definition for object presence.

Stop iteration after n items have been received

Validate that the peerDependencies of a given package.json have been satisfied.

Determine whether two geometries of the same type have identical X,Y coordinate values