Rename select-all-controller

app/webpacker/controllers/checked_controller.js

@@ -0,0 +1,19 @@
+import { Controller } from "stimulus";
+
+export default class extends Controller {
+  static targets = ["all", "checkbox"];
+
+  connect() {
+    this.toggleCheckbox()
+  }
+
+  toggleAll() {
+    this.checkboxTargets.forEach(checkbox => {
+      checkbox.checked = this.allTarget.checked;
+    });
+  }
+
+  toggleCheckbox() {
+    this.allTarget.checked = this.checkboxTargets.every(checkbox => checkbox.checked);
+  }
+}