chore: use nullish coalesce

README.md

@@ -86,10 +86,10 @@ Finally, in case you are using banners and want to have further control on the a
 </div>
 ```
 
-### Overriding default opaqueUserId behavior
+### Overriding default User ID behavior
 
-If you want to pass your own `opaqueUserId` to the library, you can do so by overiding the `getUserID()` function which is
-responsible for retrieving a unique identifier for the user. It should additionally set a new value if none is found. This function should return a string with the `opaqueUserId` passed in the events.
+If you want to pass your own User ID when sending events, you can do so by overiding the `getUserID()` function which is
+responsible for retrieving a unique identifier for the user. It should additionally set a new value if none is found. This function should return a string with the User ID (as a string) passed in the events.
 
 ```javascript
 window.TS = {

src/detector.ts

@@ -214,7 +214,7 @@ function getEvent(type: EventType, node: HTMLElement): ProductEvent {
   let product = node.dataset.tsProduct;
   let bid = node.dataset.tsResolvedBid;
   let additionalProduct: string | undefined = undefined;
-  if (bid == "inherit" && product && (type == "Click" || type == "Impression")) {
+  if (bid === "inherit" && product && (type === "Click" || type === "Impression")) {
     bid = bidStore.get();
     additionalProduct = product;
     product = undefined;
@@ -227,7 +227,7 @@ function getEvent(type: EventType, node: HTMLElement): ProductEvent {
     t: Date.now(),
     page: getPage(),
     id: generateId(),
-    uid: window.TS.getUserId() || getUserId(),
+    uid: window.TS.getUserId() ?? getUserId(),
   };
   if (type === "Purchase") {
     event.items = JSON.parse(node.dataset.tsItems || "[]");