Clean up reagent-karma-example: drop e2e, rewrite README for npm

examples/reagent-karma-example/README.md

@@ -4,26 +4,19 @@ This project was bootstrapped with [Create CLJS App](https://github.com/filipesi
 
 In the project directory, you can run:
 
-### `yarn start`
+### `npm start`
 
 Runs the app in development mode.<br>
 Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
 The page will reload if you make edits.
 
 The app uses [Reagent](https://reagent-project.github.io), a minimalistic interface between ClojureScript and React.<br>
-You can use existing npm React components directly via a [interop call](http://reagent-project.github.io/docs/master/InteropWithReact.html#creating-reagent-components-from-react-components).
+You can use existing npm React components directly via an [interop call](http://reagent-project.github.io/docs/master/InteropWithReact.html#creating-reagent-components-from-react-components).
 
-Builds use [Shadow CLJS](https://github.com/thheller/shadow-cljs) for maximum compatibility with NPM libraries. You'll need a [Java SDK](https://adoptopenjdk.net/) (Version 8+, Hotspot) to use it. <br>
+Builds use [Shadow CLJS](https://github.com/thheller/shadow-cljs) for maximum compatibility with NPM libraries. You'll need a [Java SDK](https://adoptopenjdk.net/) (Version 11+, Hotspot) to use it. <br>
 You can [import npm libraries](https://shadow-cljs.github.io/docs/UsersGuide.html#js-deps) using Shadow CLJS. See the [user manual](https://shadow-cljs.github.io/docs/UsersGuide.html) for more information.
 
-### `yarn cards`
-
-Runs the interactive live development enviroment.<br>
-You can use it to design, test, and think about parts of your app in isolation.
-
-This environment uses [Devcards](https://github.com/bhauman/devcards) and [React Testing Library](https://testing-library.com/docs/react-testing-library/intro).
-
-### `yarn build`
+### `npm run build`
 
 Builds the app for production to the `public` folder.<br>
 It correctly bundles all code and optimizes the build for the best performance.
@@ -32,25 +25,25 @@ Your app is ready to be deployed!
 
 ## Other useful scripts
 
-### `null` and `yarn e2e`
+### `npm test` and `npm run test:karma`
 
-You can use `null` to run tests a single time, and `yarn e2e` to run the end-to-end test app.
-`yarn test` launches tests in interactive watch mode.<br>
+`npm test` compiles and runs the tests once on Node (using jsdom).
+`npm run test:karma` runs the same tests in a headless Chrome via Karma.
 
-See the ClojureScript [testing page](https://clojurescript.org/tools/testing) for more information. E2E tests use [Taiko](https://github.com/getgauge/taiko) to interact with a headless browser.
+See the ClojureScript [testing page](https://clojurescript.org/tools/testing) for more information.
 
-### `yarn lint` and `yarn format`
+### `npm run lint` and `npm run fmt`
 
-`yarn lint` checks the code for known bad code patterns using [clj-kondo](https://github.com/borkdude/clj-kondo).
+`npm run lint` checks the code for known bad code patterns using [clj-kondo](https://github.com/clj-kondo/clj-kondo).
 
-`yarn format` will format your code in a consistent manner using [zprint-clj](https://github.com/clj-commons/zprint-clj).
+`npm run fmt` formats the code in a consistent manner using [Prettier](https://prettier.io) with [prettier-plugin-cljfmt](https://github.com/olecve/prettier-plugin-cljfmt).
 
-### `yarn report`
+### `npm run report`
 
 Make a report of what files contribute to your app size.<br>
 Consider [code-splitting](https://code.thheller.com/blog/shadow-cljs/2019/03/03/code-splitting-clojurescript.html) or using smaller libraries to make your app load faster.
 
-### `yarn server`
+### `npm run server`
 
 Starts a Shadow CLJS background server.<br>
 This will speed up starting time for other commands that use Shadow CLJS.
@@ -68,4 +61,3 @@ Quick reference https://cljs.info/cheatsheet/.
 Offline searchable docs https://devdocs.io/.
 
 VSCode plugin https://github.com/BetterThanTomorrow/calva.
-