oops

4 months ago · c1932aab12
parent 049b5a09bb
commit c1932aab12
1 changed files with 1 additions and 1 deletions
--- a/packages/svelte/src/internal/client/dom/elements/attributes.js
+++ b/packages/svelte/src/internal/client/dom/elements/attributes.js
@ -448,7 +448,7 @@ export function set_attributes(element, prev, next, css_hash, skip_warning = fal
 	}
 	for (let symbol of Object.getOwnPropertySymbols(next)) {
-		if (symbol.description === ATTACHMENT_KEY && !(key in prev)) {
+		if (symbol.description === ATTACHMENT_KEY && (prev == undefined || !(symbol in prev))) {
 			attach(element, () => next[symbol]);
 		}
 	}