Extract Materialize FAB controller

assets/controllers/materialize/fab_controller.js

@@ -0,0 +1,28 @@
+import { Controller } from '@hotwired/stimulus';
+import M from '@materializecss/materialize';
+
+export default class extends Controller {
+  static values = {
+    edge: { type: String, default: 'left' },
+  };
+
+  connect() {
+    this.instance = M.FloatingActionButton.init(this.element);
+  }
+
+  autoDisplay() {
+    const scrolled = (window.innerHeight + window.scrollY) >= document.body.offsetHeight;
+
+    if (scrolled) {
+      this.toggleScroll = true;
+      this.instance.open();
+    } else if (this.toggleScroll === true) {
+      this.toggleScroll = false;
+      this.instance.close();
+    }
+  }
+
+  disconnect() {
+    this.instance.destroy();
+  }
+}