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fix(event): scroll active sidebar

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This commit is contained in:
qingwei.li
2017-02-11 09:36:48 +08:00
committed by cinwell.li
parent 3941304fda
commit 50f5fc2b22
1 changed files with 4 additions and 3 deletions
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src/event.js
+4 -3
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@@ -10,6 +10,7 @@ export function scrollActiveSidebar () {
let hoveredOverSidebar = false
const anchors = document.querySelectorAll('.anchor')
const sidebar = document.querySelector('.sidebar')
const sidebarContainer = sidebar.querySelector('.sidebar-nav')
const sidebarHeight = sidebar.clientHeight
const nav = {}
@@ -57,12 +58,12 @@ export function scrollActiveSidebar () {
const currentPageOffset = 0
const currentActiveOffset = active.offsetTop + active.clientHeight + 40
const currentActiveIsInView = (
active.offsetTop >= sidebar.scrollTop &&
currentActiveOffset <= sidebar.scrollTop + sidebarHeight
active.offsetTop >= sidebarContainer.scrollTop &&
currentActiveOffset <= sidebarContainer.scrollTop + sidebarHeight
)
const linkNotFurtherThanSidebarHeight = currentActiveOffset - currentPageOffset < sidebarHeight
const newScrollTop = currentActiveIsInView
? sidebar.scrollTop
? sidebarContainer.scrollTop
: linkNotFurtherThanSidebarHeight
? currentPageOffset
: currentActiveOffset - sidebarHeight