Fix build performance issues

CHANGELOG.md

@@ -1,5 +1,16 @@
 ## Unreleased
 
+#### Changed
+
+- BREAKING: Only include `"hightlight.js/lib/core"` to fix build performance issues
+  caused by previously loading all languages. Now only Clojure support is
+  registered by default. If you are using any other language, you now need to
+  explicitly require and register it! E.g.
+  ```clojure
+  (require ["highlight.js/lib/languages/rust" :as rust])
+  (re-highlight/register-language "rust" rust)
+  ```
+
 ## 1.1.0 (2021-07-14)
 
 #### Changed

README.adoc

@@ -14,7 +14,7 @@ image:https://img.shields.io/github/license/superstructor/re-highlight?style=for
 = Reagent wrapper for Highlight.js
 
 A simple Reagent wrapper around the link:https://highlightjs.org/[Highlight.js] library, with no dependencies except Highlight.js itself
-link:https://www.npmjs.com/package/highlight.js[via npm (for shadow-cljs)] or link:https://github.com/cljsjs/packages/tree/master/highlight[via cljsjs].
+link:https://www.npmjs.com/package/highlight.js[via npm (for shadow-cljs)].
 
 == Quick Start
 
@@ -25,14 +25,8 @@ image:https://img.shields.io/clojars/v/superstructor/re-highlight?style=for-the-
 
 Requires that you have reagent as a dependency of your project: image:https://img.shields.io/clojars/v/reagent?style=for-the-badge&logo=clojure&logoColor=fff["Clojars Project", link="https://clojars.org/reagent"]
 
-If you use shadow-cljs, the `highlight.js` npm library dependency will be
-pulled automatically via `src/deps.cljs` `:npm-deps`.
-
-If you use another build system, you will probably need to add the following
-cljsjs dependency to your project:
-image:https://img.shields.io/clojars/v/cljsjs/highlight?style=for-the-badge&logo=clojure&logoColor=fff["Clojars Project", link="https://clojars.org/cljsjs/highlight"]
-
-Cljsjs is not included as a transitive dependency because it lags behind the npm release, so including it here would mean that this project depended on two different versions of Highlight.js. Cljsjs support is not a priority since shadow-cljs is the way to go these days, so code-wise it is compatible but consumers who want it have the cljsjs support need to add the dependency themselves.
+The `highlight.js` npm library dependency will be
+pulled in automatically by shadow-cljs via `src/deps.cljs` `:npm-deps`.
 
 === Step 2. Add Highlight.js Theme
 
@@ -53,11 +47,19 @@ Add a Highlight.js stylesheet to your `index.html` or equivalent; e.g.:
         {:language "clojure"}
         "(defn fibo-recursive [n]\n         (if (or (= n 0) (= n 1))\n           n\n           (+ (fibo-recursive (- n 1)) (fibo-recursive (- n 2)))))"]]])
 
+=== Step 4. Optional. Add non-Clojure Language Support
+
+Only Clojure support is registered by default. If you are using any other language, you need to  explicitly require
+and register it! E.g.
+
+    (require ["highlight.js/lib/languages/rust" :as rust])
+    (re-highlight/register-language "rust" rust)
+
 == License
 
 The MIT License (MIT)
 
-Copyright (c) 2019-2021 Isaac Johnston
+Copyright (c) 2019-2022 Isaac Johnston
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

project.clj

@@ -3,22 +3,22 @@
   :url         "https://github.com/superstructor/re-highlight.git"
   :license     {:name "MIT"}
 
-  :dependencies [[org.clojure/clojure       "1.10.3"   :scope "provided"]
-                 [org.clojure/clojurescript "1.10.879" :scope "provided"
+  :dependencies [[org.clojure/clojure       "1.11.1"   :scope "provided"]
+                 [org.clojure/clojurescript "1.11.54"  :scope "provided"
                   :exclusions [com.google.javascript/closure-compiler-unshaded
                                org.clojure/google-closure-library
                                org.clojure/google-closure-library-third-party]]
-                 [thheller/shadow-cljs      "2.15.2"   :scope "provided"]
-                 [reagent                   "1.1.0"    :scope "provided"]
+                 [thheller/shadow-cljs      "2.19.0"   :scope "provided"]
+                 [reagent                   "1.1.1"    :scope "provided"]
                  [re-com                    "2.13.2"   :scope "provided"]]
 
-  :plugins [[day8/lein-git-inject "0.0.15"]
-            [lein-shadow          "0.4.0"]
-            [lein-shell           "0.5.0"]]
+  :plugins [[day8/lein-git-inject    "0.0.15"]
+            [lein-shadow             "0.4.0"]
+            [lein-shell              "0.5.0"]]
 
   :middleware [leiningen.git-inject/middleware]
 
-  :profiles {:dev {:dependencies [[binaryage/devtools "1.0.3"]]
+  :profiles {:dev {:dependencies [[binaryage/devtools "1.0.6"]]
                    :plugins      [[com.github.liquidz/antq "RELEASE"]
                                   [lein-pprint             "1.3.2"]]}}
 

src/re_highlight/core.cljs

@@ -1,11 +1,18 @@
 (ns re-highlight.core
   (:require
-    [goog.object  :as gobj]
-    [reagent.core :as r]
-    [reagent.dom  :as rdom]
-    [highlight.js :as highlight-js]))
+    [goog.object                          :as gobj]
+    [reagent.core                         :as r]
+    [reagent.dom                          :as rdom]
+    ["highlight.js/lib/core"              :as hljs]
+    ["highlight.js/lib/languages/clojure" :as clojure]))
 
-(def highlight-element (gobj/get highlight-js "highlightElement"))
+(defn register-language
+  [label js-obj]
+  (.registerLanguage hljs label js-obj))
+
+(register-language "clojure" clojure)
+
+(def highlight-element (gobj/get hljs "highlightElement"))
 
 (defn did-mount
   [this]
@@ -15,7 +22,7 @@
 (defn did-update
   [this old-argv old-state snapshot]
   (when-let [el (gobj/get (rdom/dom-node this) "firstChild")]
-    (-> (gobj/get highlight-js "initHighlighting")
+    (-> (gobj/get hljs "initHighlighting")
         (gobj/set "called" false))
     (highlight-element el)))