Like a Set, but provides the index of the `key` in the backing array

Fixes stack traces for files with source maps

Footnotes for markdown-it markdown parser.

Extract the non-magic parent path from a glob string.

Create and parse HTTP Content-Type header

Generate random numbers from various distributions.

User interface components for Observable notebooks

Compile exponentiation operator to ES5

The legacy ESLintRC config file format for ESLint

merge() utility function

Persistent ordered mapping from strings

Locate and bundle third-party dependencies in node_modules

Extended regular expressions

TypeScript definitions for express-serve-static-core

Recursively iterates over specified directory, require()'ing each file, and returning a nested hash structure containing those modules.

Bytes go in, but they don't come out (when muted).


Next-generation ES module bundler

Run commands concurrently

ProseMirror plugin for cursors at normally impossible-to-reach positions

A toolkit for JavaScript codemods

Create, read and edit .zip files with JavaScript http://stuartk.com/jszip

Helper function to remap async functions to generators

Modern JavaScript date utility library