98 lines
2.8 KiB
JavaScript
98 lines
2.8 KiB
JavaScript
/*!
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* Color mode toggler for Bootstrap's docs (https://getbootstrap.com/)
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* Copyright 2011-2023 The Bootstrap Authors
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* Modified by Adam Goldsmith
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* Licensed under the Creative Commons Attribution 3.0 Unported License.
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*/
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(() => {
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"use strict";
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const getStoredTheme = () => localStorage.getItem("theme");
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const setStoredTheme = (theme) => localStorage.setItem("theme", theme);
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const getPreferredTheme = () => {
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const storedTheme = getStoredTheme();
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if (storedTheme) {
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return storedTheme;
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}
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return window.matchMedia("(prefers-color-scheme: dark)").matches
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? "dark"
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: "light";
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};
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const setTheme = (theme) => {
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if (
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theme === "auto" &&
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window.matchMedia("(prefers-color-scheme: dark)").matches
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) {
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document.documentElement.dataset.bsTheme = "dark";
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} else {
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document.documentElement.dataset.bsTheme = theme;
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}
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};
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setTheme(getPreferredTheme());
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const showActiveTheme = (theme, focus = false) => {
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const themeSwitcher = document.querySelector("#bd-theme");
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if (!themeSwitcher) {
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return;
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}
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const themeSwitcherText = document.querySelector("#bd-theme-text");
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const activeThemeIcon = document.querySelector(".theme-icon-active");
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const buttonToActive = document.querySelector(
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`[data-bs-theme-value="${theme}"]`,
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);
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const activeIcon = [
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...buttonToActive.querySelector(".theme-icon").classList,
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].find((c) => c.startsWith("bi-"));
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for (const element of document.querySelectorAll("[data-bs-theme-value]")) {
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element.classList.remove("active");
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element.setAttribute("aria-pressed", "false");
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}
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buttonToActive.classList.add("active");
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buttonToActive.setAttribute("aria-pressed", "true");
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for (const icon of activeThemeIcon.classList) {
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if (icon.startsWith("bi-")) {
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activeThemeIcon.classList.remove(icon);
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}
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}
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activeThemeIcon.classList.add(activeIcon);
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const themeSwitcherLabel = `${themeSwitcherText.textContent} (${buttonToActive.dataset.bsThemeValue})`;
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themeSwitcher.setAttribute("aria-label", themeSwitcherLabel);
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if (focus) {
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themeSwitcher.focus();
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}
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};
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window
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.matchMedia("(prefers-color-scheme: dark)")
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.addEventListener("change", () => {
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const storedTheme = getStoredTheme();
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if (storedTheme !== "light" && storedTheme !== "dark") {
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setTheme(getPreferredTheme());
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}
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});
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window.addEventListener("DOMContentLoaded", () => {
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console.log(getPreferredTheme());
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showActiveTheme(getPreferredTheme());
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for (const toggle of document.querySelectorAll("[data-bs-theme-value]")) {
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toggle.addEventListener("click", () => {
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const theme = toggle.dataset.bsThemeValue;
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setStoredTheme(theme);
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setTheme(theme);
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showActiveTheme(theme, true);
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});
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}
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});
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})();
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