improve dom synchronization

client/tools.ts

@@ -31,6 +31,16 @@ export async function sleep(millis: number): Promise<void> {
 	});
 }
 
+export function wait_for_dom_refresh(): Promise<void> {
+	return new Promise<void>((resolver) => {
+		requestAnimationFrame(() => {
+			requestAnimationFrame(() => {
+				resolver();
+			});
+		});
+	});
+}
+
 export namespace el {
 	function add_classes(target: HTMLElement, classes?: string[]): void {
 		if (classes === undefined) { return; }