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

Determine if the current node version supports the `--preserve-symlinks` flag.

An implementation of the WHATWG URL Standard's URL API and parsing machinery

Does the environment have full property descriptor support? Handles IE 8's broken defineProperty/gOPD.

Communicate with Percy's API to create builds and snapshots, upload resources, and finalize builds and snapshots. Uses [`@percy/env`](.packages/env) to send environment information with new builds. Can also be used to query for a project's builds using a

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

micromark extension to support frontmatter (YAML, TOML, etc)

Library to retrieve meta data (title, favicon address etc) from a url

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

Helper functions around Function call/apply/bind, for use in `call-bind`

Outputs info about system and webpack config

An ES2015 mostly-spec-compliant `Reflect.getPrototypeOf` sham/polyfill/replacement that works in as many engines as possible

Determine if the JS environment has `Symbol.toStringTag` support. Supports spec, or shams.

Is this value a JS FinalizationRegistry? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

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

mdast extension to parse and serialize frontmatter (YAML, TOML, etc)

Implementation of Function.prototype.bind

Get and robustly cache all JS language-level intrinsics at first require time

Determine if the JS environment has Symbol support. Supports spec, or shams.

Terminal string styling done right