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docs: preserve docs sidebar scroll

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Peter Steinberger 2026-05-07 00:09:33 +01:00
parent a8ccdfefe8
commit ec47b42d30
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1 changed files with 26 additions and 0 deletions
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26
scripts/build-docs-site.mjs
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@ -505,6 +505,26 @@ const sidebar=document.querySelector('.sidebar');
const toggle=document.querySelector('.nav-toggle');
const mobileNav=window.matchMedia('(max-width: 900px)');
const sidebarFocusable='a[href],button,input,select,textarea,[tabindex]';
const sidebarScrollKey='crabbox.docs.sidebar.scrollTop';
let sidebarScrollSaveTimer=0;
function readSidebarScroll(){
try{
const raw=sessionStorage.getItem(sidebarScrollKey);
const value=raw===null?NaN:Number(raw);
return Number.isFinite(value)?Math.max(0,value):0;
}catch{
return 0;
}
}
function saveSidebarScroll(){
if(!sidebar)return;
try{sessionStorage.setItem(sidebarScrollKey,String(Math.round(sidebar.scrollTop)))}catch{}
}
function scheduleSidebarScrollSave(){
if(sidebarScrollSaveTimer)return;
sidebarScrollSaveTimer=window.setTimeout(()=>{sidebarScrollSaveTimer=0;saveSidebarScroll()},120);
}
if(sidebar)sidebar.scrollTop=readSidebarScroll();
function setSidebarFocusable(enabled){
sidebar?.querySelectorAll(sidebarFocusable).forEach((el)=>{
if(enabled){
@ -535,6 +555,12 @@ function setSidebarOpen(open){
}
}
setSidebarOpen(false);
sidebar?.addEventListener('scroll',scheduleSidebarScrollSave,{passive:true});
sidebar?.addEventListener('click',(e)=>{
const link=e.target.closest?.('a[href]');
if(link)saveSidebarScroll();
});
window.addEventListener('pagehide',saveSidebarScroll);
toggle?.addEventListener('click',()=>setSidebarOpen(!sidebar?.classList.contains('open')));
document.addEventListener('click',(e)=>{if(!sidebar?.classList.contains('open'))return;if(sidebar.contains(e.target)||toggle?.contains(e.target))return;setSidebarOpen(false)});
document.addEventListener('keydown',(e)=>{if(e.key==='Escape')setSidebarOpen(false)});