Define multiple non-enumerable properties at once. Uses `Object.defineProperty` when available; falls back to standard assignment in older engines.

Adds a static `extend` method to a class, to simplify inheritance. Extends the static properties, prototype properties, and descriptors from a `Parent` constructor onto `Child` constructors.

Sham for Object.defineProperties

`Object.defineProperty`, but not IE 8's broken one.

Define a lazily evaluated property on an object

Force V8 to use fast properties for an object

Merge objects using their property descriptors

Define a non-enumerable property on an object. Uses Reflect.defineProperty when available, otherwise Object.defineProperty.

Define a data property on an object. Will fall back to assignment in an engine without descriptors.

Properties file reader for Node.js

Utility functions to deal with references in objects

An object schema merger/validator

Really Fast Deep Clone

Collection of useful helper functions when trying to determine module type (CommonJS or AMD) properties of an AST node.

Strongly-typed deep and recursive object merging. Considers all nested levels of objects, arrays, sets and maps.

Access deep object properties using a path

Feature toggle manager for Fiori tools

Define (or modify) an object property.

Copy static properties, prototype properties, and descriptors from one object to another.

extend like a boss