TSLite sanitize — fail-closed AST guard against sandbox-escape surfaces (constructor/prototype/__proto__, dangerous globals) + own-only runtime member access. DEFENSE IN DEPTH, not a security boundary (see SECURITY.md).

Global Error.invariant assertion helper (augments ErrorConstructor; TypeError.invariant resolves via constructor prototype inheritance)

constructor, prototype and __super__ inheritance for JavaScript.

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.

**Note:** More details on user side API can be found in [Jest documentation](https://jestjs.io/docs/mock-function-api).

A blazing fast deep object copier

A library to make errors.

Fastest way for creating null-prototype objects in JavaScript

List of prototype properties for JavaScript types

Scoped CustomElementRegistry Polyfill

Test whether a value has in its prototype chain a specified constructor as a prototype property.

Mix-in, inheritance and constructor extend behavior for your JavaScript enjoyment.

Source code handling classes for webpack

A utility for managing a prototype chain

Implement prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.

JSON parse with prototype poisoning protection

Broccoli plugin that allows simple caching (while still allowing N:N) based on the input tree hash.

Return the prototype of a provided object.

Prototype related utils

Mix-in, inheritance and constructor extend behavior for your JavaScript enjoyment.