JSPM

overloading javascript functions done easy

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

Reliably and recursively clone javascript objects

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

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

Shift color to fit within specific HSL bounds

Recursively mutates files in a given directory.

Agnostic tree morphing library.

n-ary tree mutation library.

JSON-encoded operations on JSON documents

Renamed to "mutant".

Invoke a function for each element in a collection and update the collection in-place.

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.

Invoke a function for each element in a collection and update the collection in-place, iterating from right to left.

A React HOC for Apollo GraphQL mutation, provides loading & error as props.

Performs a deep mutation of an existing object to equal a new object

Useful React hooks written in Typescript

Transforms objects.

Library of methods for maintaining immutable data structures

Evolutionary algorithm framework and tutorial.

Perform mutation operations on text strings (or text files). Useful for (simple) automatic code refactorings f.ex in code generators

Magical package to work with immutable Redux reducers.

Function that inserts new items at a specified index in the array

easily mutate and validate json data

Invoke a function for each element in a collection and update the collection in-place.

helper library to remove boilplate code from reducers

Generate and apply descriptions of changes between objects.

Utility library for immutable objects management

Invoke a function for each element in a collection and update the collection in-place, iterating from right to left.

Lightweight URL parsing and manipulation library.

Swiss-army knife for observation of objects (Angular compatible)

React Query hooks for Firebase Cloud Firestore

Scalable genetic algorithm cluster using Node.js and webSockets

Mess with the properties of deeply nested objects.

GraphQL client for React apps that don't need everything

coming soon

Allows to mutate the webpack configuration before is being used by @angular-devkit/build-angular:browser

Mutates object properties as specified by functions

Greatly simplifies vanilla javascript variable interactions, assertions, and mutations.

Remove all non-number characters and return a number. '$1,234' → 1234

React Query hooks for Firebase Cloud Firestore

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Makeify is a utility to create objects with nested values

Modify an object using query without mutating the original object.

The amazing string mutator

Observe mutations to a scalar, object or array in Angular

Clone and modify a RegExp instance, including removing, prepending, appending & replacing the source

Remove or replace part of a Buffer like Array#splice

'flow' is a small JavaScript library containing some methods for organizing code with mutating functions in a particular way.

Easily add user-defined extensions into your react application

Draw one random element from an array

event interceptors - like middleware for EventEmitter

A function to convert plain javascript object(usually deserialized from JSON) into some class instance

React Query hooks for Firebase Cloud Firestore

React Query hooks for Firebase Cloud Firestore

React Query hooks for Firebase Cloud Firestore

Methods to mutate part of a falcor graph as if it was an array

A collection of methods to mutate objects and arrays without modifying the source.

DOM mutator for A/B experiments.

a react library for fetch data fast and easy

to replace redux,Provider value contain useActions which is to merge context state value and useActions return an immutable function collection called `actions`

Implementations of ES2015 collections (Array, Set, Map, WeakSet, WeakMap) which emit an rxjs observable stream of changes

Greatly simplifies vanilla javascript variable interactions, assertions, and mutations.

React Query hooks for Firebase Cloud Firestore

Not fastest but powerful immutable helper

CLI command ast parser manipulate program bash powershell generic agnostic.

JSON reshaping library w/ asynchronous support powered by RegEx. Create transform flows for JSON->JSON needs

to replace redux,Provider value contain useActions which is to merge context state value and useActions return an immutable function collection called `actions`

useState for Psychopaths

query utility for mongodb

javascript function to mutate every string in deep nested objects