@jsdevtools/karma-host-environment/lib/karma-host.d.ts

Access host info (OS, browser version, environment variables) in browser tests

import { Host } from "@jsdevtools/host-environment";
/**
 * Extends the Host interface with information about the Karma server.
 */
export interface KarmaHost extends Host {
    /**
     * If running in a web browser being served by Karma, then this property is
     * the `Host` object of the Karma server.  This allows you to access things like
     * the server's OS, Node version, etc.
     */
    karma?: Host;
}