Avoid an error on the item market when switching categories.

Author: DeKleineKobini

extension/changelog.json

@@ -5,7 +5,10 @@
 		"date": false,
 		"logs": {
 			"features": [],
-			"fixes": [{ "message": "Correctly count the supply pack value.", "contributor": "DeKleineKobini" }],
+			"fixes": [
+				{ "message": "Correctly count the supply pack value.", "contributor": "DeKleineKobini" },
+				{ "message": "Avoid an error on the item market when switching categories.", "contributor": "DeKleineKobini" }
+			],
 			"changes": [{ "message": "Better optimize calls to tornpal.", "contributor": "DeKleineKobini" }],
 			"removed": []
 		}

extension/scripts/content/itemmarket/ttItemMarket.js

@@ -52,9 +52,12 @@
 
 		triggerCustomListener(EVENT_CHANNELS.ITEMMARKET_CATEGORY_ITEMS, { list });
 		[...list.findAll("[class*='itemList___'] > li")].forEach((itemElement) => {
+			const priceElement = itemElement.find("[class*='priceAndTotal___'] span:first-child");
+			if (!priceElement) return;
+
 			new MutationObserver(() => {
 				triggerCustomListener(EVENT_CHANNELS.ITEMMARKET_CATEGORY_ITEMS_UPDATE, { item: itemElement });
-			}).observe(itemElement.find("[class*='priceAndTotal___'] span:first-child"), { subtree: true, characterData: true });
+			}).observe(priceElement, { subtree: true, characterData: true });
 		});
 		if (!mobile && !tablet) {
 			new MutationObserver(async (mutations) => {