refactor: use helper for null in undefined in condition

Signed-off-by: Jérôme Benoit <jerome.benoit@sap.com>

diff --git a/src/charging-station/ChargingStation.ts b/src/charging-station/ChargingStation.ts
index d9f548d71c47aa15ee55d4ebf32ccdbde5ffad91..beefcf45025e334011d2f138267ec4eb85d2a05d 100644 (file)
--- a/src/charging-station/ChargingStation.ts
+++ b/src/charging-station/ChargingStation.ts
@@ -1033,7 +1033,7 @@ export class ChargingStation {
   }
 
   private stopReservationExpirationSetInterval(): void {
-    if (this.reservationExpirationSetInterval) {
+    if (!isNullOrUndefined(this.reservationExpirationSetInterval)) {
       clearInterval(this.reservationExpirationSetInterval);
     }
   }