Use optional parameters when possible

Signed-off-by: Mcat12 <newtoncat12@yahoo.com>

src/components/common/EnableDisable.tsx

@@ -72,7 +72,7 @@ class EnableDisable extends Component<EnableDisableProps, EnableDisableState> {
    * @param action The action to perform ("enable" or "disable")
    * @param time The amount of time to disable for. This setting is optional.
    */
-  setStatus = (action: StatusAction, time: number | null = null) => {
+  setStatus = (action: StatusAction, time?: number) => {
     if (this.state.processing) {
       // Wait for the first status change to go through
       return;

src/components/common/WithAPIData.tsx

@@ -70,7 +70,7 @@ export class WithAPIData<T> extends Component<
 
   private dataHandle: CancelablePromise<T> | undefined;
 
-  loadData = (data: T | null = null) => {
+  loadData = (data?: T) => {
     // Only repeat if there is a non-zero repeat interval
     const cancelOptions =
       this.props.repeatOptions.interval !== 0
@@ -85,7 +85,7 @@ export class WithAPIData<T> extends Component<
       this.dataHandle.cancel();
     }
 
-    if (data !== null) {
+    if (data) {
       // Some data was given, it should be used as the API response
       this.setState({ apiResult: new Ok(data) });
 

src/util/api.tsx

@@ -84,7 +84,7 @@ export default {
   getStatus(): Promise<ApiStatus> {
     return http.get("dns/status");
   },
-  setStatus(action: StatusAction, time: number | null = null) {
+  setStatus(action: StatusAction, time?: number) {
     return http.post("dns/status", { action, time });
   },
   getNetworkInfo(): Promise<ApiNetworkSettings> {