JS theme switching simplified
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@ -5,7 +5,6 @@ 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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const THEME_SYSTEM = '';
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// TODO: theme state controlled by system
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toggle_theme.addEventListener('click', function () {
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@ -16,28 +15,16 @@ toggle_theme.addEventListener('click', function () {
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helpers.xhr('GET', '/toggle_theme?redirect=false', {}, {});
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});
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// Ask system about dark theme
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var systemDarkTheme = matchMedia('(prefers-color-scheme: dark)');
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systemDarkTheme.addListener(function () {
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// Ignore system events if theme set manually
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if (!helpers.storage.get(STORAGE_KEY_THEME))
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setTheme(THEME_SYSTEM);
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});
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/** @param {THEME_DARK|THEME_LIGHT|THEME_SYSTEM} theme */
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/** @param {THEME_DARK|THEME_LIGHT} theme */
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function setTheme(theme) {
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if (theme === THEME_DARK || (theme === THEME_SYSTEM && systemDarkTheme.matches)) {
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toggle_theme.children[0].setAttribute('class', 'icon ion-ios-sunny');
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document.body.classList.remove('no-theme');
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document.body.classList.remove('light-theme');
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document.body.classList.add('dark-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].setAttribute('class', 'icon ion-ios-moon');
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document.body.classList.remove('no-theme');
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document.body.classList.remove('dark-theme');
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document.body.classList.add('light-theme');
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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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@ -50,6 +37,8 @@ addEventListener('storage', function (e) {
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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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setTheme(prefTheme);
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helpers.storage.set(STORAGE_KEY_THEME, prefTheme);
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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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