Safe navigation of objects (avoid null pointer exceptions / avoid TypeError cannot access property 'x' of undefined)

Type checking for JavaScript functions

A safer `.hasOwnProperty()`

Intuitive mocking for Typescript class imports

MongoDB connection strings, based on the WhatWG URL API

Emit event periodically (even when app is in the background)

Check if a value is a Fetch network error

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

`Object.defineProperty`, but not IE 8's broken one.

Define a data property on an object. Will fall back to assignment in an engine without descriptors.

tiny util for getting and setting deep object props safely

Low footprint ECMAScript source code parser

Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.

Match a Unicode property or property alias to its canonical property name per the algorithm used for RegExp Unicode property escapes in ECMAScript.

Properties file reader for Node.js

Unicode property alias mappings in JavaScript format for property names that are supported in ECMAScript RegExp property escapes.

Info on the properties and attributes of the web platform

Define a non-enumerable property on an object. Uses Reflect.defineProperty when available, otherwise Object.defineProperty.

Jest hooks for JSDOM location mock

Serialize/deserialize an error into a plain object