installing Sass

app/assets/app.js

@@ -8,5 +8,8 @@
 // any CSS you import will output into a single css file (app.css in this case)
 import './styles/app.css';
 
+// SCSS
+import './styles/app.scss';
+
 // start the Stimulus application
 import './bootstrap';

app/assets/styles/app.scss

@@ -0,0 +1,4 @@
+
+h1 {
+   font-size: 400%;
+}