From 49162fd0e1b13c29c64e05b23845edd4b603923c Mon Sep 17 00:00:00 2001
From: Andreas Walter <andreas.walter@uni-bayreuth.de>
Date: Fri, 14 Jun 2024 15:05:03 +0200
Subject: [PATCH] declare board ids

---
 libs/formulas_extension/JSXQuestion.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libs/formulas_extension/JSXQuestion.js b/libs/formulas_extension/JSXQuestion.js
index f4d4069..aa2ba7c 100644
--- a/libs/formulas_extension/JSXQuestion.js
+++ b/libs/formulas_extension/JSXQuestion.js
@@ -258,6 +258,7 @@ var JSXQuestion = function(boardIDs, jsxGraphCode, allowInputEntry, decimalPreci
 
         for (i = 0; i < that.BOARDIDS.length; i++) {
             attr = attributes[i] || attributes[0]; // First attributes are default.
+            attr.id = attr.id ?? that.BOARDIDS[i] + '_board';
             board = JXG.JSXGraph.initBoard(that.BOARDIDS[i], attr);
             that.boards.push(board);
         }
@@ -288,6 +289,7 @@ var JSXQuestion = function(boardIDs, jsxGraphCode, allowInputEntry, decimalPreci
             JXG.JSXGraph.freeBoard(that.boards[index]);
         }
 
+        attributes.id = attributes.id ?? that.BOARDIDS[index] + '_board';
         that.boards[index] = JXG.JSXGraph.initBoard(that.BOARDIDS[index], attributes);
         return that.boards[index];
     };
@@ -473,4 +475,4 @@ if (!Element.prototype.closest) {
         } while (el !== null && el.nodeType === 1);
         return null;
     };
-}
+}
\ No newline at end of file