build: Compress code in production environments

rollup.config.js

@@ -9,13 +9,7 @@ import { terser } from "rollup-plugin-terser";
 import postcss_import from 'postcss-import';
 import postcss_copy from 'postcss-copy';
 
-export default {
-	input: 'client_src/js/index.mjs',
-	output: {
-		file: 'app/app.js',
-		format: 'esm'
-	},
-	plugins: [
+let plugins = [
 	resolve({
 		// use "module" field for ES6 module if possible
 		module: true, // Default: true
@@ -62,13 +56,24 @@ export default {
 		extract: true,
 		sourceMap: true,
 		//minimize: true, // Causes an error at the moment for some reason
-		}),
+	})
+];
 
-		// terser({
-		// 	numWorkers: os.cpus().length,
-		// 	compress: {
-		// 		ecma: 6
-		// 	}
-		// })
-	]
+if(process.env.NODE_ENV == "production") {
+	console.log("[config] In production environment - minifying JS");
+	plugins.push(terser({
+		numWorkers: os.cpus().length,
+		compress: {
+			ecma: 6
+		}
+	}));
+}
+
+export default {
+	input: 'client_src/js/index.mjs',
+	output: {
+		file: 'app/app.js',
+		format: 'esm'
+	},
+	plugins
 };