Add the express-handlebars as a template engine.

package.json

@@ -7,6 +7,7 @@
   },
   "dependencies": {
     "express": "^4.19.2",
+    "express-handlebars": "^7.1.2",
     "pg": "^8.11.3"
   }
 }

src/main/blog/server.cljs

@@ -1,5 +1,6 @@
 (ns blog.server
   (:require ["express" :as express]
+            ["express-handlebars" :refer [engine]]
             [blog.db :as db]
             [blog.env :as env]))
 
@@ -7,6 +8,22 @@
 (def port (env/get-port))
 (def client (db/create-client))
 
+(defn setup-engine
+  "Sets the engine to handlebars and simple set up."
+  []
+
+  ; For using .hbs as the file extension instead of .handlebars
+  (. app
+     engine ".hbs" (engine (-> {:extname ".hbs"
+                                :defaultLayout "main"}
+                               (cljs.core/clj->js))))
+
+  (. app
+     set "view engine" ".hbs")
+
+  (. app
+     set "views" "./views"))
+
 (defn set-routes
   "Sets the routes for server."
   []
@@ -17,6 +34,7 @@
 (defn start
   "Starts server."
   []
+  (setup-engine)
   (set-routes)
 
   (db/connect-client client)