67 lines
1.6 KiB
JavaScript
67 lines
1.6 KiB
JavaScript
/*
|
|
* Hide Header on scroll down
|
|
* v2.0
|
|
* https://github.com/cotes2020/jekyll-theme-chirpy
|
|
* © 2018-2019 Cotes Chung
|
|
* MIT License
|
|
*/
|
|
|
|
$(function() {
|
|
|
|
var didScroll;
|
|
var lastScrollTop = 0;
|
|
var delta = 5;
|
|
var topbarHeight = $('#topbar-wrapper').outerHeight();
|
|
|
|
$(window).scroll(function(event) {
|
|
if ($("#topbar-title").is(":hidden")) { /* Not in small screens */
|
|
didScroll = true;
|
|
}
|
|
});
|
|
|
|
setInterval(function() {
|
|
if (didScroll) {
|
|
hasScrolled();
|
|
didScroll = false;
|
|
}
|
|
}, 250);
|
|
|
|
function hasScrolled() {
|
|
var st = $(this).scrollTop();
|
|
|
|
/* Make sure they scroll more than delta */
|
|
if (Math.abs(lastScrollTop - st) <= delta)
|
|
return;
|
|
|
|
if (st > lastScrollTop && st > topbarHeight) {
|
|
/* Scroll Down */
|
|
$('#topbar-wrapper').removeClass('topbar-down').addClass('topbar-up');
|
|
|
|
if ( $('#toc-wrapper').length > 0) {
|
|
$('#toc-wrapper').removeClass('topbar-down');
|
|
}
|
|
|
|
if ( $('.access').length > 0) {
|
|
$('.access').removeClass('topbar-down');
|
|
}
|
|
|
|
if ($('#search-input').is(':focus')) {
|
|
$('#search-input').blur(); /* remove focus */
|
|
}
|
|
|
|
} else {
|
|
/* Scroll Up */
|
|
if (st + $(window).height() < $(document).height()) {
|
|
$('#topbar-wrapper').removeClass('topbar-up').addClass('topbar-down');
|
|
if ( $('#toc-wrapper').length > 0) {
|
|
$('#toc-wrapper').addClass('topbar-down');
|
|
}
|
|
if ( $('.access').length > 0) {
|
|
$('.access').addClass('topbar-down');
|
|
}
|
|
}
|
|
}
|
|
|
|
lastScrollTop = st;
|
|
}
|
|
}); |