feat: add collection

frontend/src/utils/debounce.ts

@@ -0,0 +1,24 @@
+export class Debounce {
+  private timer: number | null = null;
+  private readonly delay: number;
+
+  constructor(delay: number) {
+    this.delay = delay;
+  }
+
+  run(callback: () => void) {
+    if (this.timer) {
+      clearTimeout(this.timer);
+    }
+    this.timer = setTimeout(() => {
+      callback();
+    }, this.delay);
+  }
+
+  cancel() {
+    if (this.timer) {
+      clearTimeout(this.timer);
+      this.timer = null;
+    }
+  }
+}