Refactor

inokawa · Jul 24, 2023 · a9405a0 · a9405a0
1 parent db9b7c1
commit a9405a0
Showing 1 changed file with 6 additions and 4 deletions.
diff --git a/src/core/store.ts b/src/core/store.ts
@@ -27,6 +27,7 @@ const calculateJumps = (cache: Cache, items: ItemResize[]): ItemJump[] => {
  });
 };
 
+// Scroll offset and sizes can have sub-pixel value if window.devicePixelRatio has decimal value
 const SUBPIXEL_THRESHOLD = 1.5; // 0.5 * 3
 
 export const SCROLL_IDLE = 0;
@@ -218,9 +219,10 @@ export const createVirtualStore = (
 
  if (scrollOffset === 0) {
  // Do nothing to stick to the start
- }
- // Check including subpixels because window.devicePixelRatio can have decimal value
- else if (scrollOffset > getScrollOffsetMax() - SUBPIXEL_THRESHOLD) {
+ } else if (
+ scrollOffset >
+ getScrollOffsetMax() - SUBPIXEL_THRESHOLD
+ ) {
  // Keep end to stick to the end
  diff = sumJumps(allJumps);
  } else {
@@ -262,9 +264,9 @@ export const createVirtualStore = (
  }
  case ACTION_WINDOW_RESIZE: {
  if (viewportSize !== payload) {
+ viewportSize = payload;
  mutated = UPDATE_SIZE;
  }
- viewportSize = payload;
  break;
  }
  case ACTION_SCROLL: