JS - Fix categories + related error alert

1 files changed, 3 insertions, 2 deletions

diff --git a/src/static/main.js b/src/static/main.js
index 2aac66f..04ea88a 100644
--- a/src/static/main.js
+++ b/src/static/main.js
@@ -76,18 +76,19 @@ function alterHeatMapParameter(event) {
 }
 
 async function fetchCategories() {
+	let response;
 	try {
-			const response = await fetch("categories.json");
+			response = await fetch("categories.json");
 
 		if (!response.ok) {
 			// If the response status is not OK, throw an error
 			throw new Error(`HTTP error! Status: ${response.status}`);
 		}
-			CategoryField.pattern = categories.join('|');
 		} catch (error) {
 			alert(`Failed to fetch categories\n${error.message}`)
 		}
 	categories = await response.json();
+	CategoryField.pattern = categories.join('|');
 	const CategoriesDataList = document.getElementById('CategoriesDataList');
 	categories.forEach(function(item){
 		var option = document.createElement('option');