16c250fa33
* fix: Add theme switcher to document view And reduce duplication in the page structure while I'm here. Fixes #6200 * Fix tests
94 lines
3.2 KiB
JavaScript
94 lines
3.2 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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* Licensed under the Creative Commons Attribution 3.0 Unported License.
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*
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* Based on the below, with some changes for the datatracker:
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* https://github.com/twbs/bootstrap/blob/main/site/static/docs/5.3/assets/js/color-modes.js
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*/
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(() => {
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'use strict'
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const getStoredTheme = () => localStorage.getItem('theme') || 'auto'
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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 ? 'dark' : 'light'
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}
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const setTheme = theme => {
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if (theme === 'auto') {
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if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
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document.documentElement.setAttribute('data-bs-theme', 'dark')
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} else if (window.matchMedia('(prefers-color-scheme: light)').matches) {
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document.documentElement.setAttribute('data-bs-theme', 'light')
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}
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} else {
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document.documentElement.setAttribute('data-bs-theme', 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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// Commented-out lines are from the original bs5 js, which uses a more complicated pref dropdown.
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// Kept them here for easier future diffing.
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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 btnToActive = document.querySelector(`[data-bs-theme-value="${theme}"]`)
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const iconPattern = new RegExp(/\bbi-[\w-]+\b/);
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const iconOfActiveBtn = btnToActive.querySelector('i').className.match(iconPattern)[0]
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document.querySelectorAll('[data-bs-theme-value]').forEach(element => {
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element.classList.remove('active')
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element.setAttribute('aria-pressed', 'false')
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})
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btnToActive.classList.add('active')
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btnToActive.setAttribute('aria-pressed', 'true')
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if (activeThemeIcon) {
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activeThemeIcon.className = activeThemeIcon.className.replace(iconPattern, iconOfActiveBtn)
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}
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if (themeSwitcherText) {
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const themeSwitcherLabel = `${themeSwitcherText.textContent} (${btnToActive.dataset.bsThemeValue})`
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themeSwitcher.setAttribute('aria-label', themeSwitcherLabel)
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}
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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.matchMedia('(prefers-color-scheme: dark)').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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showActiveTheme(getPreferredTheme())
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document.querySelectorAll('[data-bs-theme-value]')
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.forEach(toggle => {
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toggle.addEventListener('click', () => {
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const theme = toggle.getAttribute('data-bs-theme-value')
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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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