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const Sidebar = {
observeSidebar() {
const options = {
root: null,
rootMargin: '0px 0px 35px 0px',
threshold: 1
};
/**
* Observe if sidebar fits into viewport.
*/
const sidebar = document.getElementById('sidebar');
if (sidebar) {
const sObserver = new IntersectionObserver(STUDIP.Sidebar.fits, options);
sObserver.observe(sidebar, options);
}
},
observeFooter() {
const options = {
root: null,
rootMargin: '0px',
threshold: 1
};
/**
* Observe if the footer is visible in viewport.
*/
const fObserver = new IntersectionObserver(STUDIP.Sidebar.footerVisible, options);
fObserver.observe(document.getElementById('main-footer'), options);
},
reset() {
const sidebar = document.getElementById('sidebar');
if (sidebar) {
sidebar.classList.remove('oversized', 'was-oversized', 'fixed');
sidebar.style.top = '';
STUDIP.Sidebar.observeSidebar();
}
},
fits(entries, observer) {
const sidebar = document.getElementById('sidebar');
if (sidebar) {
entries.forEach(entry => {
// Sidebar fits onto current page.
if (entry.isIntersecting) {
sidebar.classList.remove('oversized');
} else {
sidebar.classList.add('oversized', 'was-oversized');
}
});
}
},
footerVisible(entries, observer) {
const sidebar = document.getElementById('sidebar');
if (sidebar) {
entries.forEach(entry => {
// Footer is visible on current page.
if (entry.isIntersecting) {
sidebar.classList.remove('no-footer');
} else {
sidebar.classList.add('no-footer');
}
});
}
}
};
export default Sidebar;
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