web/assets/js/_commons/topbar-title.js

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/*
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* Topbar title auto change while scrolling in mobile screens.
* v2.0
* https://github.com/cotes2020/jekyll-theme-chirpy
* © 2018-2019 Cotes Chung
* MIT License
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*/
$(function() {
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var DEFAULT = $("#topbar-title").text().trim();
var title = ($("div.post>h1").length > 0) ?
$("div.post>h1").text().trim() : $("h1").text().trim();
if ($("#page-category").length || $("#page-tag").length) {
/* The title in Category or Tag page will be '<title> <count_of_posts>' */
if (/\s/.test(title)) {
title = title.replace(/[0-9]/g, '').trim();
}
}
/* Replace topbar title while scroll screens. */
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$(window).scroll(function () {
if ($("#post-list").length /* in Home page */
|| $("div.post>h1").is(":hidden") /* is tab pages */
|| $("#topbar-title").is(":hidden") /* not mobile screens */
|| $("#sidebar.sidebar-expand").length) { /* when the sidebar trigger is clicked */
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return false;
}
if ($(this).scrollTop() >= 95) {
if ($("#topbar-title").text() != title) {
$("#topbar-title").text(title);
}
} else {
if ($("#topbar-title").text() != DEFAULT) {
$("#topbar-title").text(DEFAULT);
}
}
});
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/* Click title remove hover effect. */
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$('#topbar-title').click(function() {
$('body,html').animate({scrollTop: 0}, 800);
});
});