Inherit all stimulus controllers from base_controller

app/javascript/controllers/base_controller.js

@@ -0,0 +1,23 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  static values = {
+    selfHosted: Boolean
+  }
+
+  // Every controller that extends BaseController and uses initialize()
+  // should call super.initialize()
+  // Example:
+  // export default class extends BaseController {
+  //   initialize() {
+  //     super.initialize()
+  //   }
+  // }
+  initialize() {
+    // Get the self-hosted value from the HTML root element
+    if (!this.hasSelfHostedValue) {
+      const selfHosted = document.documentElement.dataset.selfHosted === 'true'
+      this.selfHostedValue = selfHosted
+    }
+  }
+}