fix(core): Do not consider undefined for emptyOn

Author: Airblader

projects/ngqp/core/src/lib/model.ts

@@ -174,7 +174,8 @@ export class QueryParamControl<T> {
     private changeFunctions: OnChangeFunction<T>[] = [];
 
     constructor(opts: QueryParamControlOpts<T>) {
-        const { name, serialize, deserialize, debounceTime, emptyOn, compareWith, combineWith } = opts;
+        const { name, serialize, deserialize, debounceTime, compareWith, combineWith } = opts;
+        const { emptyOn = null } = opts;
         const multi = opts.multi === true;
 
         if (isMissing(name)) {

projects/ngqp/core/src/lib/serializers.ts

@@ -12,7 +12,7 @@ export function createEmptyOnSerializer<T>(serializer: ParamSerializer<T>, empty
  * TODO Documentation
  */
 export function createEmptyOnDeserializer<T>(deserializer: ParamDeserializer<T>, emptyOn: T): ParamDeserializer<T> {
-    return (value: string | null) => isMissing(value) ? emptyOn : deserializer(value);
+    return (value: string | null) => value === null ? emptyOn : deserializer(value);
 }
 
 /**