substack/tape

Robustly `.call.bind()` a function

node's assert.deepEqual algorithm

the most correct and second fastest glob implementation in JavaScript

Browser-friendly inheritance fully compatible with standard node.js inherits()

parse argument options

Given an object and a property, replaces a property descriptor (or deletes it), and returns a thunk to restore it.

An Object.keys replacement, in case Object.keys is not available. From https://github.com/es-shims/es5-shim

ES6 spec-compliant Object.assign shim. From https://github.com/es-shims/es6-shim

resolve like require.resolve() on behalf of files asynchronously and synchronously

My shareable eslint config

Command line tool for generating a changelog from git tags and commit history

writable stream that concatenates strings or binary data and calls a callback with the result

Run scripts that set and use environment variables across platforms

A simple static file server middleware

transform the ast on a recursive walk

the Istanbul command line interface

Ensure that when you `npm publish`, the "latest" tag is only set for the truly latest version.

The semantic version parser used by npm.

A Test-Anything-Protocol library for JavaScript

a through stream that starts paused and resumes on the next tick

simplified stream construction

An ES5 spec-compliant `Array.prototype.every` shim/polyfill/replacement that works as far down as ES3.

return the first argument that is `!== undefined`

ignorefile/includefile matching .gitignore spec

A better forEach

Determine the `package.json#type` which applies to a location

Does the current environment have `import()` support?

A robust, ES3 compatible, "has own property" predicate.

Is this value a JS regex? Works cross-realm/iframe, and despite ES6 @@toStringTag

string representations of objects in node and the browser

ES2015-compliant shim for Object.is - differentiates between -0 and +0

ES5 spec-compliant shim for String.prototype.trim

An ES2019 spec-compliant `Array.prototype.flatMap` shim/polyfill/replacement that works as far down as ES3.

Validate or fix code that doesn't adhere to EditorConfig settings or infer settings from existing code.

Convert encodings, uses iconv-lite

Fixtures of ES values, for testing purposes

A very strict and proper argument parser.

Portable NPM scripts when those have to work on Windows too

Command line tool for creating or updating a .npmignore file based on .gitignore.

parse the test anything protocol

transformer testing module

human-readable TAP summarizer

write adventure verify functions with tape

Predicate that returns true for "falsy" values.

Tape test runner with promise support

Wrapper for zlib.js to allow for browserifyication

merge multiple geojson files

Check if nested object has property

Concatenate ArrayBuffers

Web3 ProviderEngine is a tool for composing your own web3 providers

Better environment variable handling for Twelve-Factor node apps

This module walks the Ethereum blockchain, keeping track of the latest block. It uses a web3 provider as a data source and will continuously poll for the next block.

A set of utilities for working with BIP32.

Predicate that returns true for "boolean" values.

Easily require OSM usernames and user IDs of the Mapbox Data Team

Request information about the state of Open Publish documents.

Signature validation library aiming to verify all different signature types for Ethereum and other EVM chains, including smart contract signatures (EIP 1271) and typed data (EIP 712)

Binary operations for logical sets

A set of utilities for working with BIP32.

Unit tests that always supply a good bug report when they fail.

Ethereum IDE and tools for the web

Small utils to make developing with d3 easier, inspired by d3-jetpack and d3-starterkit

core/crypto

A type checker

ChainSQL IDE and tools for the web, modified from Ethereum

node, test, emitter

sitespeed.io is an open-source tool for comprehensive web performance analysis, enabling you to test, monitor, and optimize your website’s speed using real browsers in various environments.

Ethereum IDE and tools for the web

converts decimal to binary recursively

A test Common Wallet object for testing software written to the commonWallet spec.

wrapper around blockcypher's api. Conforms to a standard derived from bitcoind and common-blockchain