sendnrw/misskey
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

wip

Browse Source
This commit is contained in:
syuilo
2025-03-21 18:46:25 +09:00
parent 3c6f3992b0
commit 2eef19d95d
9 changed files with 96 additions and 63 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
packages/frontend-shared/js/scroll.ts
View File

@@ -38,7 +38,7 @@ export function getScrollPosition(el: HTMLElement | null): number {
export function onScrollTop(el: HTMLElement, cb: (topVisible: boolean) => unknown, tolerance = 1, once = false) {
// とりあえず評価してみる
const firstTopVisible = isTopVisible(el);
const firstTopVisible = isHeadVisible(el);
if (el.isConnected && firstTopVisible) {
cb(firstTopVisible);
if (once) return null;
@@ -53,7 +53,7 @@ export function onScrollTop(el: HTMLElement, cb: (topVisible: boolean) => unknow
const onScroll = () => {
if (!document.body.contains(el)) return;
const topVisible = isTopVisible(el, tolerance);
const topVisible = isHeadVisible(el, tolerance);
if (topVisible !== prevTopVisible) {
prevTopVisible = topVisible;
cb(topVisible);
@@ -71,7 +71,7 @@ export function onScrollBottom(el: HTMLElement, cb: () => unknown, tolerance = 1
const container = getScrollContainer(el);
// とりあえず評価してみる
if (el.isConnected && isBottomVisible(el, tolerance, container)) {
if (el.isConnected && isTailVisible(el, tolerance, container)) {
cb();
if (once) return null;
}
@@ -79,7 +79,7 @@ export function onScrollBottom(el: HTMLElement, cb: () => unknown, tolerance = 1
const containerOrWindow = container ?? window;
const onScroll = () => {
if (!document.body.contains(el)) return;
if (isBottomVisible(el, 1, container)) {
if (isTailVisible(el, 1, container)) {
cb();
if (once) removeListener();
}
@@ -132,12 +132,12 @@ export function scrollToBottom(
}
}
export function isTopVisible(el: HTMLElement, tolerance = 1): boolean {
export function isHeadVisible(el: HTMLElement, tolerance = 1): boolean {
const scrollTop = getScrollPosition(el);
return scrollTop <= tolerance;
}
export function isBottomVisible(el: HTMLElement, tolerance = 1, container = getScrollContainer(el)) {
export function isTailVisible(el: HTMLElement, tolerance = 1, container = getScrollContainer(el)) {
if (container) return el.scrollHeight <= container.clientHeight + Math.abs(container.scrollTop) + tolerance;
return el.scrollHeight <= window.innerHeight + window.scrollY + tolerance;
}