Creating a cljs REPL from terminal using deps.edn and clj command

cljs-repl-with-core.matrix-deps.edn

;; Save this file as deps.edn in some directory that doesn't already
;; have such a file.

;; You must have the following installed for the command below to have
;; a chance of working:

;; + A JDK, e.g. from AdoptOpenJDK web site: https://adoptopenjdk.net
;; + Clojure CLI tools.  Install instructions here:
;;   https://clojure.org/guides/getting_started
;; + Node.js JavaScript runtime environment.  Some prepackaged ways to
;; install:
;;   + Ubuntu 18.04 Linux: `sudo apt-get install nodejs`
;;   + macOS
;;     + plus Homebrew: `brew install node`
;;     + plus MacPorts: `sudo port install nodejs10`.  You can see
;;       other versions available via the command `port list | grep
;;       nodejs`.

;; clj -m cljs.main --repl-env node

;; If that is successful, you should eventually see output like this:

;; $ clj -m cljs.main --repl-env node
;; ClojureScript 1.10.520
;; cljs.user=> 

;; At the REPL, I could evaluate these forms without errors:

;; (require '[clojure.core.matrix :as m])
;; (require '[clojure.core.matrix.dataset :as d])

;; cljs.user=> (m/identity-matrix 2)
;; [[1 0] [0 1]]
;; cljs.user=> (m/shape [[2 3 4] [5 6 7]])
;; [2 3]
;; cljs.user=> (m/mmul (m/array [[2 2] [3 3]]) (m/array [[4 4] [5 5]]))
;; [[18 18] [27 27]]

;; I have not tried using the core.matrix library any more extensively
;; than that, yet.

;; In the directory where you run this, a .cpcache directory will be
;; created by clj to cache information about dependencies.

;; It will also write files to a $HOME/.cljs/.aot_cache directory,
;; which appears to be a cache of ClojureScript source files and their
;; corresponding compiled-to-JavaScript results, from the
;; ClojureScript compiler.

;; As most JDK things do, it will download JAR files and save them to
;; your $HOME/.m2 directory.

{:deps {org.clojure/clojurescript {:mvn/version "1.10.520"}
        net.mikera/core.matrix {:mvn/version "0.62.0"}}
 :aliases
 {:socket {:jvm-opts ["-XX:-OmitStackTraceInFastThrow"
                      "-Dclojure.server.repl={:port,50505,:accept,cljs.server.node/repl}"]}}}