add link builder to enable dynamic link building

app/javascript/controllers/index.js

@@ -3,3 +3,6 @@
 // ./bin/rails generate stimulus controllerName
 
 import { application } from "./application"
+
+import LinkBuilderController from "./link_builder_controller"
+application.register("link-builder", LinkBuilderController)

app/javascript/controllers/link_builder_controller.js

@@ -0,0 +1,14 @@
+import { Controller } from "@hotwired/stimulus"
+
+// Connects to data-controller="link-builder"
+export default class extends Controller {
+  static targets = ['source', 'destination']
+  static values = { param: String }
+
+  updateDestinationParams() {
+    const url = new URL(this.destinationTarget.href);
+    const params = new URLSearchParams(url.search);
+    params.set(this.paramValue, this.sourceTarget.value)
+    this.destinationTarget.href = `${url.origin}${url.pathname}?${params}`;
+  }
+}