From 99aa3b26409a40ab43ab037499462e60c70ef5c6 Mon Sep 17 00:00:00 2001
From: MoonE <maxi_kroeg@web.de>
Date: Fri, 14 May 2021 21:03:51 +0200
Subject: [PATCH] Correctly initialize attribution aria state

Co-authored-by: Marc Jansen <jansen@terrestris.de>
---
 src/ol/control/Attribution.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/ol/control/Attribution.js b/src/ol/control/Attribution.js
index b72620b60b..7d1ff8234a 100644
--- a/src/ol/control/Attribution.js
+++ b/src/ol/control/Attribution.js
@@ -147,7 +147,7 @@ class Attribution extends Control {
      */
     this.toggleButton_ = document.createElement('button');
     this.toggleButton_.setAttribute('type', 'button');
-    this.toggleButton_.setAttribute('aria-expanded', String(false));
+    this.toggleButton_.setAttribute('aria-expanded', String(!this.collapsed_));
     this.toggleButton_.title = tipLabel;
     this.toggleButton_.appendChild(activeLabel);