1 files changed, 10 insertions, 10 deletions

diff --git a/subprojects/frontend/src/utils/Timer.ts b/subprojects/frontend/src/utils/Timer.ts
index 14e9eb81..4bb1bb9c 100644
--- a/subprojects/frontend/src/utils/Timer.ts
+++ b/subprojects/frontend/src/utils/Timer.ts
@@ -1,33 +1,33 @@
 export default class Timer {
-  readonly callback: () => void;
+  private readonly callback: () => void;
 
-  readonly defaultTimeout: number;
+  private readonly defaultTimeout: number;
 
-  timeout: number | null = null;
+  private timeout: number | undefined;
 
   constructor(callback: () => void, defaultTimeout = 0) {
     this.callback = () => {
-      this.timeout = null;
+      this.timeout = undefined;
       callback();
     };
     this.defaultTimeout = defaultTimeout;
   }
 
-  schedule(timeout: number | null = null): void {
-    if (this.timeout === null) {
-      this.timeout = setTimeout(this.callback, timeout || this.defaultTimeout);
+  schedule(timeout?: number | undefined): void {
+    if (this.timeout === undefined) {
+      this.timeout = setTimeout(this.callback, timeout ?? this.defaultTimeout);
     }
   }
 
-  reschedule(timeout: number | null = null): void {
+  reschedule(timeout?: number | undefined): void {
     this.cancel();
     this.schedule(timeout);
   }
 
   cancel(): void {
-    if (this.timeout !== null) {
+    if (this.timeout !== undefined) {
       clearTimeout(this.timeout);
-      this.timeout = null;
+      this.timeout = undefined;
     }
   }
 }