Finished phase005

app/javascript/controllers/maintenance_odometer_warning_controller.js

@@ -0,0 +1,20 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  static targets = ["odometer", "warning"]
+  static values = {
+    currentOdometer: Number,
+    threshold: Number
+  }
+
+  check() {
+    const odometer = Number.parseInt(this.odometerTarget.value, 10)
+
+    if (Number.isNaN(odometer) || odometer >= this.currentOdometerValue - this.thresholdValue) {
+      this.warningTarget.hidden = true
+      return
+    }
+
+    this.warningTarget.hidden = false
+  }
+}