X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=www%2Fjs%2Fbook.js;h=fff27fc1f0a7a4756481a0725fcb55040ccc7ff0;hb=7d5e6433543116d5ecd0c4627ab1e063bf06da11;hp=9ed5ee5c7ae31491bf8a170252d27cf9b8755fff;hpb=fc7cab1217dc904a888240e577f4da5001cf4bdb;p=remoteglot-book

diff --git a/www/js/book.js b/www/js/book.js
index 9ed5ee5..fff27fc 100644
--- a/www/js/book.js
+++ b/www/js/book.js
@@ -216,9 +216,13 @@ var show_lines = function(data, game) {
 }
 
 var make_move = function(move) {
-	history.length = move_override;
-	history.push(move);
-	move_override = history.length;
+	if (move_override < history.length && history[move_override] == move) {
+		// User effectively only moved forward in history.
+		++move_override;
+	} else {
+		history.push(move);
+		move_override = history.length;
+	}
 	update();
 }
 window['make_move'] = make_move;