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2 changes: 1 addition & 1 deletion web_src/js/features/repo-home.ts
Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ export function initRepoTopicBar() {
// how to test: input topic like " invalid topic " (with spaces), and select it from the list, then "Save"
const responseData = await response.json();
lastErrorToast = showErrorToast(responseData.message, {duration: 5000});
if (responseData.invalidTopics.length > 0) {
if (responseData.invalidTopics && responseData.invalidTopics.length > 0) {
const {invalidTopics} = responseData;
const topicLabels = queryElemChildren(topicDropdown, 'a.ui.label');
for (const [index, value] of topics.split(',').entries()) {
Expand Down