differential-browsers

💡 This library is a fork of Polymer/tools/packages/browser-capabilities, but the repository has been dead for two years. The biggest offender here is Anaheim edge that is now chromium based.

A JavaScript library that detects browser capabilities from a user agent string.

The following keywords are supported. See differential-browsers.ts for the latest browser support matrix.

Keyword	Description
push	HTTP/2 Server Push
serviceworker	Service Worker API
modules	JavaScript Modules (including dynamic import() and import.meta)
es2015	ECMAScript 2015 (aka ES6)
es2016	ECMAScript 2016
es2017	ECMAScript 2017
es2018	ECMAScript 2018

TODO:

• [ ] push is supported for <link rel="preload" ...>, but modulepreload is not available
• [ ] es2019 - covering: flat and flatMap Array methods, try .. catchoptional binding,Object.fromEntries, stable Array.sort`, and more
• [ ] es2020 - covering: optional chaining (?.), nullish coalescing (??), export * as namespace and BigInt, and more