fix: sveltejs#4233 bind:offsetHeight doesn't always fire

josdejong · Dec 8, 2022 · 9a9db1c · 9a9db1c
1 parent aa5a1cd
commit 9a9db1c
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/runtime/internal/dom.ts b/src/runtime/internal/dom.ts
@@ -624,6 +624,10 @@ export function add_resize_listener(node: HTMLElement, fn: () => void) {
 		iframe.src = 'about:blank';
 		iframe.onload = () => {
 			unsubscribe = listen(iframe.contentWindow, 'resize', fn);
+
+			// make sure an initial resize event is fired _after_ the iframe is loaded (which is asynchronous)
+			// see https://github.com/sveltejs/svelte/issues/4233
+			fn();
 		};
 	}