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'use strict';
// get current theme
function getNowTheme() {
let nowTheme = document.body.getAttribute('data-theme');
if (nowTheme === 'auto') {
return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
} else {
return nowTheme === 'dark' ? 'dark' : 'light';
}
}
// update utterances theme
function updateUtterancesTheme(utterancesFrame) {
let targetTheme = getNowTheme();
if (utterancesFrame) {
if (targetTheme === 'dark') {
utterancesFrame.contentWindow.postMessage(
{
type: 'set-theme',
theme: 'photon-dark',
},
'https://utteranc.es'
);
} else {
utterancesFrame.contentWindow.postMessage(
{
type: 'set-theme',
theme: 'github-light',
},
'https://utteranc.es'
);
}
}
}
// load comment button only when comment area exist
if (document.querySelector('span.post-comment-notloaded')) {
document.querySelector('span.post-comment-notloaded').addEventListener('click', loadComment);
}
// to-top button
document.querySelector('.btn .btn-scroll-top').addEventListener('click', () => {
document.documentElement.scrollTop = 0;
});
// theme switch button
document.querySelector('.btn .btn-toggle-mode').addEventListener('click', () => {
let nowTheme = getNowTheme();
let domTheme = document.body.getAttribute('data-theme');
let systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
if (domTheme === 'auto') {
// if now in auto mode, switch to user mode
document.body.setAttribute('data-theme', nowTheme === 'light' ? 'dark' : 'light');
localStorage.setItem('fuji_data-theme', nowTheme === 'light' ? 'dark' : 'light');
} else if (domTheme === 'light') {
// if now in user mode and light mode
document.body.setAttribute('data-theme', 'dark');
// if the theme want to switch is system theme
localStorage.setItem('fuji_data-theme', systemTheme === 'dark' ? 'auto' : 'dark');
} else {
// if now in user mode and dark mode
document.body.setAttribute('data-theme', 'light');
// if the theme want to switch is system theme
localStorage.setItem('fuji_data-theme', systemTheme === 'light' ? 'auto' : 'light');
}
// switch comment area theme
// if this page has comment area
let commentArea = document.querySelector('.post-comment');
if (commentArea) {
// if comment area loaded
if (document.querySelector('span.post-comment-notloaded').getAttribute('style')) {
if (commentArea.getAttribute('data-comment') === 'utterances') {
updateUtterancesTheme(document.querySelector('.post-comment iframe'));
}
if (commentArea.getAttribute('data-comment') === 'disqus') {
DISQUS.reset({
reload: true,
});
}
}
}
});
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