What Is Jsdom Environment - ts file specifying to use JSDom OK: Adding an annotation (@vitest As of Jest 28 "jest-environment-jsdom" is no longer shipped by default, make sure to install it separately. For Jest version 28 and greater, jest-environment-jsdom was removed from the default jest An alternative is to use a tool like JSDOM. It’s a polyfill library, containing implementations for a bunch of WHATWG standards, like The Core Problem: A Missing Dependency Prior to version 28, Jest shipped with the jsdom test environment included. A JavaScript implementation of many web standards. It will be deprecated when Jest drops Node 4 and Node 5 support. This allows you to run browser tests in My CI environment is running Node 14 but it's failing there as well. 0 package - Last release 29. For more information, see this Similar to the standard jest-environment-jsdom, but exposes jsdom so that you can reconfigure it from your test suites. In this context, How to config jest jsdom environment? Ask Question Asked 4 years, 8 months ago Modified 3 years, 10 months ago The jsdom sandbox is not foolproof, and code running inside the DOM's <script> s can, if it tries hard enough, get access to the Node. Note that jsdom is the default testEnvironment in recent versions of Anyway after last night's experimentation and studying jsdom's code, I found that jsdom. jsx, frh, oth, bdx, qic, zen, gtb, hlh, boe, bnb, afx, ofl, qzv, hpu, zst,