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A tiny (239B) utility for constructing className strings conditionally.

Construct HTTP/HTTPS agents for tunneling proxies

A path proxy object constructor

Error constructor for test and validation frameworks that implements standardized AssertionError specification.

Class factory featuring inheritance of static properties, static constructors, lazy population of prototypes, and this._super.

This changes RegExp constructors into literals if the RegExp arguments are strings.

**Note:** Not recommended if full support for IE8 and lower is required. [Details](https://github.com/babel/minify/pull/45#discussion_r70181249)

A write stream constructor that supports a flush function that is called before finish is emitted

Properly constructed base class for error objects

Compile ES2015 sticky regex to an ES5 RegExp constructor

Constructible style sheets/adopted style sheets polyfill

Proper decorator-based transformation / serialization / deserialization of plain javascript objects to class constructors

esformatter plugin that converts array and object constructors to literal notations

Cross-browser `CustomEvent` constructor

Escapes a string literal for use as an argument in the standard RegExp constructor.

A library to help construct a graphql-js server supporting react-relay.

Look up HTML tag names via HTML Element constructors, and vice versa.

Determine and test types using constructor or {}.toString

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.

Call function constructors with an array of arguments that spread

Custom error constructor factory.

Deep clone utility , together with circular reference detection and proper inheritance chain reconstruction

Tiny library that simplifies subclassing and inheriting from Error while keeping the correct name and stack. Also supports constructing from an object of properties. Saves you from boilerplate.

A simple library for merging complex options.

Errors constructor for simple error handling.

constructors for the Shift AST format

Constructor inheritance.

A function that returns the normally hidden `GeneratorFunction` constructor

This plugin allows Babel to transform class constructors (deprecated)

Compile ES2015 sticky regex to an ES5 RegExp constructor