const getStoredThemeStyle = () => localStorage.getItem('theme');
|
|
const setThemeClass = (style) => {
|
const body = document.body;
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const prevTheme = [...body.classList].find((c) => c.match(/theme--(light|dark)/));
|
if (!prevTheme) return;
|
body.classList.remove(prevTheme);
|
body.classList.add(`theme--${style}`);
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};
|
|
const setThemeStyle = (style) => {
|
localStorage.setItem('theme', style);
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setThemeClass(style);
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};
|
|
const switchTheme = () => {
|
const currThemeStyle = getStoredThemeStyle();
|
switch (currThemeStyle) {
|
case 'light':
|
setThemeStyle('dark');
|
break;
|
case 'dark':
|
setThemeStyle('light');
|
break;
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default:
|
setThemeStyle('light');
|
break;
|
}
|
};
|
|
const initTheme = () => {
|
const currThemeStyle = getStoredThemeStyle();
|
if (currThemeStyle) {
|
setThemeStyle(currThemeStyle);
|
return;
|
}
|
const userPrefersDark = window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches;
|
if (!userPrefersDark) return;
|
setThemeStyle('dark');
|
};
|
|
document.addEventListener(
|
'DOMContentLoaded',
|
() => {
|
const themeSwitcher = document.querySelector('.themeswitch');
|
themeSwitcher.addEventListener('click', switchTheme, false);
|
},
|
false,
|
);
|
|
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', switchTheme, false);
|
|
document.addEventListener('DOMContentLoaded', () => initTheme());
|