website/js/main.js

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JavaScript
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2023-06-11 17:49:33 +00:00
document.addEventListener('DOMContentLoaded', ready, false);
const THEME_PREF_STORAGE_KEY = "theme-preference";
const THEME_TO_ICON_CLASS = {
'dark': 'feather-moon',
'light':'feather-sun'
};
const THEME_TO_ICON_TEXT_CLASS = {
'dark': 'Dark mode',
'light':'Light mode'
};
let toggleIcon = '';
let darkThemeCss = '';
const HEADING_TO_TOC_CLASS = {
'H1': 'level-1',
'H2': 'level-2',
'H3': 'level-3',
'H4': 'level-4'
}
function ready() {
feather.replace({ 'stroke-width': 1, width: 20, height: 20 });
setThemeByUserPref();
if (document.querySelector('main#content > .container') !== null &&
document.querySelector('main#content > .container').classList.contains('post')) {
if (document.getElementById('TableOfContents') !== null) {
fixTocItemsIndent();
addSmoothScroll();
createScrollSpy();
} else {
document.querySelector('main#content > .container.post').style.display = "block";
}
}
// Elements to inject
const svgsToInject = document.querySelectorAll('img.svg-inject');
// Do the injection
SVGInjector(svgsToInject);
document.getElementById('hamburger-menu-toggle').addEventListener('click', () => {
const hamburgerMenu = document.getElementsByClassName('nav-hamburger-list')[0]
if (hamburgerMenu.classList.contains('visibility-hidden')) {
hamburgerMenu.classList.remove('visibility-hidden');
} else {
hamburgerMenu.classList.add('visibility-hidden');
}
})
}
window.addEventListener('scroll', () => {
if (window.innerWidth <= 820) {
// For smaller screen, show shadow earlier
toggleHeaderShadow(50);
} else {
toggleHeaderShadow(100);
}
});
function fixTocItemsIndent() {
document.querySelectorAll('#TableOfContents a').forEach($tocItem => {
const itemId = $tocItem.getAttribute("href").substring(1)
$tocItem.classList.add(HEADING_TO_TOC_CLASS[document.getElementById(itemId).tagName]);
});
}
function addSmoothScroll() {
document.querySelectorAll('#toc a').forEach($anchor => {
$anchor.addEventListener('click', function (e) {
e.preventDefault();
document.getElementById(this.getAttribute('href').substring(1)).scrollIntoView({
behavior: 'smooth',
block: 'start' //scroll to top of the target element
});
});
});
}
function createScrollSpy() {
var elements = document.querySelectorAll('#toc a');
document.addEventListener('scroll', function () {
elements.forEach(function (element) {
const boundingRect = document.getElementById(element.getAttribute('href').substring(1)).getBoundingClientRect();
if (boundingRect.top <= 55 && boundingRect.bottom >= 0) {
elements.forEach(function (elem) {
elem.classList.remove('active');
});
element.classList.add('active');
}
});
});
}
function toggleHeaderShadow(scrollY) {
if (window.scrollY > scrollY) {
document.querySelectorAll('.header').forEach(function(item) {
item.classList.add('header-shadow')
})
} else {
document.querySelectorAll('.header').forEach(function(item) {
item.classList.remove('header-shadow')
})
}
}
function setThemeByUserPref() {
darkThemeCss = document.getElementById("dark-theme");
const savedTheme = localStorage.getItem(THEME_PREF_STORAGE_KEY) ||
(window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark': 'light');
const darkThemeToggles = document.querySelectorAll('.dark-theme-toggle');
setTheme(savedTheme, darkThemeToggles);
darkThemeToggles.forEach(el => el.addEventListener('click', (event) => {
toggleIcon = event.currentTarget.querySelector("a svg.feather");
if (toggleIcon.classList[1] === THEME_TO_ICON_CLASS.dark) {
setTheme('light', [event.currentTarget]);
} else if (toggleIcon.classList[1] === THEME_TO_ICON_CLASS.light) {
setTheme('dark', [event.currentTarget]);
}
}));
}
function setTheme(themeToSet, targets) {
localStorage.setItem(THEME_PREF_STORAGE_KEY, themeToSet);
darkThemeCss.disabled = themeToSet === 'light';
targets.forEach((target) => {
target.querySelector('a').innerHTML = feather.icons[THEME_TO_ICON_CLASS[themeToSet].split('-')[1]].toSvg();
target.querySelector("#dark-theme-toggle-screen-reader-target").textContent = [THEME_TO_ICON_TEXT_CLASS[themeToSet]];
});
}