45 行
1.5 KiB
JavaScript
45 行
1.5 KiB
JavaScript
'use strict';
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var toggle_theme = document.getElementById('toggle_theme');
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toggle_theme.href = 'javascript:void(0)';
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const STORAGE_KEY_THEME = 'dark_mode';
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const THEME_DARK = 'dark';
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const THEME_LIGHT = 'light';
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// TODO: theme state controlled by system
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toggle_theme.addEventListener('click', function () {
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const isDarkTheme = helpers.storage.get(STORAGE_KEY_THEME) === THEME_DARK;
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const newTheme = isDarkTheme ? THEME_LIGHT : THEME_DARK;
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setTheme(newTheme);
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helpers.storage.set(STORAGE_KEY_THEME, newTheme);
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helpers.xhr('GET', '/toggle_theme?redirect=false', {}, {});
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});
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/** @param {THEME_DARK|THEME_LIGHT} theme */
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function setTheme(theme) {
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// By default body element has .no-theme class that uses OS theme via CSS @media rules
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// It rewrites using hard className below
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if (theme === THEME_DARK) {
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toggle_theme.children[0].className = 'icon ion-ios-sunny';
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document.body.className = 'dark-theme';
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} else {
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toggle_theme.children[0].className = 'icon ion-ios-moon';
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document.body.className = 'light-theme';
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}
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}
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// Handles theme change event caused by other tab
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addEventListener('storage', function (e) {
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if (e.key === STORAGE_KEY_THEME)
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setTheme(helpers.storage.get(STORAGE_KEY_THEME));
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});
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// Set theme from preferences on page load
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addEventListener('DOMContentLoaded', function () {
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const prefTheme = document.getElementById('dark_mode_pref').textContent;
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if (prefTheme) {
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setTheme(prefTheme);
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helpers.storage.set(STORAGE_KEY_THEME, prefTheme);
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}
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});
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