Prevent unnecessary "page spread state" updates

Only update state in case it has changed
2024-12-25 23:50:07 +01:00
parent 3b62506452
commit 5220f8ca44
1 changed files with 6 additions and 1 deletions
--- a/src/modules/reader/components/viewer/ReaderViewer.tsx
+++ b/src/modules/reader/components/viewer/ReaderViewer.tsx
@@ -172,7 +172,12 @@ const BaseReaderViewer = forwardRef(
                if (readingMode === ReadingMode.DOUBLE_PAGE) {
                    const img = new Image();
                    img.onload = () => {
-                        setPagesToSpreadState((prevState) => prevState.toSpliced(index, 1, isSpreadPage(img)));
+                        const isSpreadPageFlag = isSpreadPage(img);
+                        if (pagesToSpreadState[index] === isSpreadPageFlag) {
+                            return;
+                        }
+
+                        setPagesToSpreadState((prevState) => prevState.toSpliced(index, 1, isSpreadPageFlag));
                    };
                    img.src = url;
                }