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authorcrupest <crupest@outlook.com>2022-04-24 14:20:52 +0800
committercrupest <crupest@outlook.com>2022-04-24 14:20:52 +0800
commitd8adfa6b141c8e3a8f11592b831c574dee8602b9 (patch)
tree55c4457642f247d09d8d2af0d2e4ec82fa63258f /FrontEnd/src/utilities
parent392bd22adb1dcceeb14724d1e93ca44f9d1656a1 (diff)
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Diffstat (limited to 'FrontEnd/src/utilities')
-rw-r--r--FrontEnd/src/utilities/useReverseScrollPositionRemember.ts77
-rw-r--r--FrontEnd/src/utilities/useScrollToTop.ts2
2 files changed, 1 insertions, 78 deletions
diff --git a/FrontEnd/src/utilities/useReverseScrollPositionRemember.ts b/FrontEnd/src/utilities/useReverseScrollPositionRemember.ts
deleted file mode 100644
index a5812808..00000000
--- a/FrontEnd/src/utilities/useReverseScrollPositionRemember.ts
+++ /dev/null
@@ -1,77 +0,0 @@
-import React from "react";
-
-let on = false;
-
-let reverseScrollPosition = getReverseScrollPosition();
-let reverseScrollToPosition: number | null = null;
-let lastScrollPosition = window.scrollY;
-
-export function getReverseScrollPosition(): number {
- if (document.documentElement.scrollHeight <= window.innerHeight) {
- return 0;
- } else {
- return (
- document.documentElement.scrollHeight -
- document.documentElement.scrollTop -
- window.innerHeight
- );
- }
-}
-
-export function scrollToReverseScrollPosition(reversePosition: number): void {
- if (document.documentElement.scrollHeight <= window.innerHeight) return;
-
- const old = document.documentElement.style.scrollBehavior;
- document.documentElement.style.scrollBehavior = "auto";
-
- const newPosition =
- document.documentElement.scrollHeight -
- window.innerHeight -
- reversePosition;
-
- reverseScrollToPosition = newPosition;
-
- window.scrollTo(0, newPosition);
-
- document.documentElement.style.scrollBehavior = old;
-}
-
-const scrollListener = (): void => {
- if (
- reverseScrollToPosition != null &&
- Math.abs(window.scrollY - reverseScrollToPosition) > 50
- ) {
- scrollToReverseScrollPosition(reverseScrollPosition);
- return;
- }
- if (
- reverseScrollToPosition == null &&
- Math.abs(window.scrollY - lastScrollPosition) > 1000
- ) {
- scrollToReverseScrollPosition(reverseScrollPosition);
- return;
- }
-
- reverseScrollToPosition = null;
- lastScrollPosition = window.scrollY;
- reverseScrollPosition = getReverseScrollPosition();
-};
-
-const resizeObserver = new ResizeObserver(() => {
- scrollToReverseScrollPosition(reverseScrollPosition);
-});
-
-export default function useReverseScrollPositionRemember(): void {
- React.useEffect(() => {
- if (on) return;
- on = true;
- window.addEventListener("scroll", scrollListener);
- resizeObserver.observe(document.documentElement);
-
- return () => {
- window.removeEventListener("scroll", scrollListener);
- resizeObserver.disconnect();
- on = false;
- };
- }, []);
-}
diff --git a/FrontEnd/src/utilities/useScrollToTop.ts b/FrontEnd/src/utilities/useScrollToTop.ts
index 892e3545..95c8b7b9 100644
--- a/FrontEnd/src/utilities/useScrollToTop.ts
+++ b/FrontEnd/src/utilities/useScrollToTop.ts
@@ -6,7 +6,7 @@ function useScrollToTop(
handler: () => void,
enable = true,
option = {
- maxOffset: 50,
+ maxOffset: 5,
throttle: 1000,
}
): void {