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

Accessibility engine for automated Web UI testing

Get the ArrayBuffer out of a TypedArray, robustly.

Get the byteLength out of a DataView, robustly.

Get the byteOffset out of a DataView, robustly.

Does this environment have the ability to get the [[Prototype]] of an object on creation with `__proto__`?

Check if argv has a specific flag

Get the ArrayBuffer out of a DataView, robustly.

Cross platform child_process#spawn and child_process#spawnSync

utilities for primitive JavaScript types

TypeScript utility type WithRequired

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Check if a string has ANSI escape codes

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

Streaming http in the browser

Style elements relative to other elements in CSS

Working around a Safari 14 IndexedDB bug

Check if a project is using Yarn

Validate that the peerDependencies of a given package.json have been satisfied.

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