94 lines
2.3 KiB
JavaScript
94 lines
2.3 KiB
JavaScript
/* Copyright (C) 2025 Moko Consulting <hello@mokoconsulting.tech>
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This file is part of a Moko Consulting project.
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SPDX-License-Identifier: GPL-3.0-or-later
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# FILE INFORMATION
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DEFGROUP: Joomla.Template.Site
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INGROUP: Moko-Cassiopeia
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PATH: ./media/templates/site/moko-cassiopeia/js/theme-init.js
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VERSION: 03.05.00
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BRIEF: Initialization script for Moko-Cassiopeia theme features and behaviors
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*/
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(function (win, doc) {
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"use strict";
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var storageKey = "theme"; // localStorage key
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var mql = win.matchMedia("(prefers-color-scheme: dark)");
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var root = doc.documentElement;
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/**
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* Apply theme to <html>, syncing both data-bs-theme and data-aria-theme.
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* @param {"light"|"dark"} theme
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*/
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function applyTheme(theme) {
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root.setAttribute("data-bs-theme", theme);
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root.setAttribute("data-aria-theme", theme);
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try { localStorage.setItem(storageKey, theme); } catch (e) {}
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}
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/**
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* Clear stored preference so system preference is followed.
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*/
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function clearStored() {
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try { localStorage.removeItem(storageKey); } catch (e) {}
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}
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/**
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* Determine system theme.
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*/
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function systemTheme() {
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return mql.matches ? "dark" : "light";
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}
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/**
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* Initialize theme on load.
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*/
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function init() {
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var stored = null;
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try { stored = localStorage.getItem(storageKey); } catch (e) {}
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var theme = stored ? stored : systemTheme();
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applyTheme(theme);
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// Listen for system changes only if Auto mode (no stored)
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var onChange = function () {
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if (!localStorage.getItem(storageKey)) {
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applyTheme(systemTheme());
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}
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};
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if (typeof mql.addEventListener === "function") {
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mql.addEventListener("change", onChange);
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} else if (typeof mql.addListener === "function") {
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mql.addListener(onChange);
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}
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// Hook toggle UI if present
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var switchEl = doc.getElementById("themeSwitch");
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var autoBtn = doc.getElementById("themeAuto");
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if (switchEl) {
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switchEl.checked = (theme === "dark");
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switchEl.addEventListener("change", function () {
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var choice = switchEl.checked ? "dark" : "light";
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applyTheme(choice);
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});
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}
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if (autoBtn) {
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autoBtn.addEventListener("click", function () {
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clearStored();
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applyTheme(systemTheme());
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});
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}
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}
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if (doc.readyState === "loading") {
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doc.addEventListener("DOMContentLoaded", init);
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} else {
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init();
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}
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})(window, document);
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