diff --git a/src/selector_manager/model/State.js b/src/selector_manager/model/State.ts
similarity index 64%
rename from src/selector_manager/model/State.js
rename to src/selector_manager/model/State.ts
index 0669a1349..176964109 100644
--- a/src/selector_manager/model/State.js
+++ b/src/selector_manager/model/State.ts
@@ -1,4 +1,4 @@
-import { Model } from '../../common';
+import { Model } from "../../common";
 
 /**
  * @typedef State
@@ -8,8 +8,8 @@ import { Model } from '../../common';
 export default class State extends Model {
   defaults() {
     return {
-      name: '',
-      label: '',
+      name: "",
+      label: "",
     };
   }
 
@@ -17,17 +17,16 @@ export default class State extends Model {
    * Get state name
    * @returns {String}
    */
-  getName() {
-    return this.get('name');
+  getName(): string {
+    return this.get("name");
   }
 
   /**
    * Get state label. If label was not provided, the name will be returned.
    * @returns {String}
    */
-  getLabel() {
-    return this.get('label') || this.getName();
+  getLabel(): string {
+    return this.get("label") || this.getName();
   }
 }
-
-State.prototype.idAttribute = 'name';
+State.prototype.idAttribute = "name";