82 lines
2.7 KiB
JavaScript
82 lines
2.7 KiB
JavaScript
/*!
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* Color mode toggler for Bootstrap's docs (https://getbootstrap.com/)
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* Copyright 2011-2024 The Bootstrap Authors
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* Licensed under the Creative Commons Attribution 3.0 Unported License.
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* Modified to work with a simpler checkbox toggle & support prettify CSS themes
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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 = () => window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'
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const getStoredPreferredTheme = () => {
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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 getPreferredTheme()
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}
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const delStoredPrettifyTheme = () => localStorage.removeItem('themePrettify')
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const getStoredPrettifyTheme = () => localStorage.getItem('themePrettify')
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const setStoredPrettifyTheme = theme => localStorage.setItem('themePrettify', theme)
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const getPrettifyThemeLink = () => {
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for (const sheet of document.getElementsByTagName('link')) {
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if (sheet.rel === 'stylesheet' && sheet.href.includes('css/prettify/') && !sheet.href.includes('css/prettify/prettify.css')) {
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return sheet
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}
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}
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return null
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}
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const setTheme = theme => {
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const preferredTheme = theme === 'auto' ? getPreferredTheme() : theme
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document.documentElement.setAttribute('data-bs-theme', preferredTheme)
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const sheetPrettify = getPrettifyThemeLink()
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if (sheetPrettify) {
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sheetPrettify.remove()
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}
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const link = document.createElement('link')
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link.rel = 'stylesheet'
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if (preferredTheme === 'dark') {
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link.href = 'css/prettify/sons-of-obsidian.css'
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document.head.appendChild(link)
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} else {
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const themePrettify = getStoredPrettifyTheme()
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if (themePrettify) {
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link.href = themePrettify
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document.head.appendChild(link)
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}
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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(getStoredPreferredTheme())
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}
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})
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window.addEventListener('DOMContentLoaded', () => {
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const sheetPrettify = getPrettifyThemeLink()
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if (sheetPrettify) {
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setStoredPrettifyTheme(sheetPrettify.href)
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} else {
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delStoredPrettifyTheme()
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}
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const toggle = document.querySelector('#bd-theme')
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const theme = getStoredPreferredTheme()
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setTheme(theme)
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toggle.checked = (theme === 'dark')
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toggle.addEventListener('change', (event) => {
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const theme = event.currentTarget.checked ? 'dark' : 'light'
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setStoredTheme(theme)
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setTheme(theme)
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event.currentTarget.focus()
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})
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})
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})()
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