Mutate Packages

Clone and modify a RegExp instance

event interceptors - like middleware for EventEmitter

Weapon regeX mutates regular expressions for use in mutation testing.

A few reliable utils.

Create observables and map them to DOM elements. Massively inspired by hyperscript and observ-*. No virtual dom, just direct observable bindings. Unnecessary garbage collection is avoided by using mutable objects instead of blasting immutable junk all ove

Mutate the filesystem behavior for tests.

Reliably and recursively clone javascript objects

Plugin for providing a GraphQL client in Piral.

Fastest Array.filter alternative --- mutates original array!

Remove or replace part of a string like `Array#splice`

Provides types and tools for editing `package.json` files

A immutability library which requires minimum overhead per call

Transform object keys easily using whatever transform function

A React hook for inspecting and mutating shared state without subscribing to render updates.

Alter arguments and return values before and after a function is called

n-ary tree mutation library.

> Move element in a given array from one index to another ..with some extra > functions.

Simple library for deep merge of objects and other types (also for patch and immutable updates). Declarative operations to specific merge, for example to remove properties. Customize merging between specific types. Calculating diffs.

overloading javascript functions done easy

Object mutation pipelines for flow control