|
1 | | -const getStoredTheme = () => localStorage.getItem('theme') |
2 | | -const lightIcon = "bi bi-sun-fill" |
3 | | -const darkIcon = "bi bi-moon-fill" |
| 1 | +/*! |
| 2 | + * Color mode toggler for Bootstrap's docs (https://getbootstrap.com/) |
| 3 | + * Copyright 2011-2024 The Bootstrap Authors |
| 4 | + * Licensed under the Creative Commons Attribution 3.0 Unported License. |
| 5 | + */ |
4 | 6 |
|
| 7 | +(() => { |
| 8 | + 'use strict'; |
5 | 9 |
|
6 | | -const setIcon = theme => { |
7 | | - icon = theme == "light" ? lightIcon : darkIcon |
8 | | - document.getElementById('theme-icon').className = icon |
9 | | -} |
| 10 | + const getStoredTheme = () => localStorage.getItem('theme'); |
| 11 | + const setStoredTheme = theme => localStorage.setItem('theme', theme); |
10 | 12 |
|
11 | | -const handleThemeChange = () => { |
12 | | - getStoredTheme() == 'dark' ? setTheme("light") : setTheme("dark") |
13 | | -} |
| 13 | + const getPreferredTheme = () => { |
| 14 | + const storedTheme = getStoredTheme(); |
| 15 | + if (storedTheme) { |
| 16 | + return storedTheme; |
| 17 | + } |
14 | 18 |
|
15 | | -const setTheme = theme => { |
16 | | - document.documentElement.setAttribute('data-bs-theme', theme) |
17 | | - localStorage.setItem('theme', theme) |
18 | | - setIcon(theme) |
19 | | -} |
| 19 | + return window.matchMedia('(prefers-color-scheme: dark)').matches |
| 20 | + ? 'dark' |
| 21 | + : 'light'; |
| 22 | + }; |
20 | 23 |
|
21 | | -// icon needs to be set after page is loaded |
22 | | -const setInitialIcon = () => { |
23 | | - getStoredTheme() == 'dark' ? setIcon("dark") : setIcon("light") |
24 | | -} |
25 | | -window.onload = (event) => { |
26 | | - // example pages should always be light theme |
27 | | - if (window.location.pathname.includes("/examples") ) { |
28 | | - return document.documentElement.setAttribute('data-bs-theme', "light") |
29 | | - } |
30 | | - setInitialIcon() |
| 24 | + const setTheme = theme => { |
| 25 | + if (window.location.pathname.startsWith('/examples')) { |
| 26 | + // examples page currently can't handle dark mode well... |
| 27 | + document.documentElement.setAttribute('data-bs-theme', 'light'); |
| 28 | + } else if (theme === 'auto') { |
| 29 | + document.documentElement.setAttribute( |
| 30 | + 'data-bs-theme', |
| 31 | + window.matchMedia('(prefers-color-scheme: dark)').matches |
| 32 | + ? 'dark' |
| 33 | + : 'light' |
| 34 | + ); |
| 35 | + } else { |
| 36 | + document.documentElement.setAttribute('data-bs-theme', theme); |
| 37 | + } |
| 38 | + }; |
31 | 39 |
|
32 | | -}; |
| 40 | + setTheme(getPreferredTheme()); |
33 | 41 |
|
| 42 | + const showActiveTheme = (theme, focus = false) => { |
| 43 | + const themeSwitcher = document.querySelector('#bd-theme'); |
34 | 44 |
|
| 45 | + if (!themeSwitcher) { |
| 46 | + return; |
| 47 | + } |
35 | 48 |
|
| 49 | + const themeSwitcherText = document.getElementById('bd-theme-text'); |
| 50 | + const activeThemeIcon = document.getElementById('theme-icon-active'); |
| 51 | + const btnToActive = document.querySelector( |
| 52 | + `[data-bs-theme-value="${theme}"]` |
| 53 | + ); |
| 54 | + const classOfActiveBtn = btnToActive |
| 55 | + .querySelector('i') |
| 56 | + .getAttribute('class'); |
| 57 | + |
| 58 | + document.querySelectorAll('[data-bs-theme-value]').forEach(element => { |
| 59 | + element.classList.remove('active'); |
| 60 | + element.setAttribute('aria-pressed', 'false'); |
| 61 | + }); |
| 62 | + |
| 63 | + btnToActive.classList.add('active'); |
| 64 | + btnToActive.setAttribute('aria-pressed', 'true'); |
| 65 | + activeThemeIcon.setAttribute('class', classOfActiveBtn); |
| 66 | + const themeSwitcherLabel = `${themeSwitcherText.textContent} (${btnToActive.dataset.bsThemeValue})`; |
| 67 | + themeSwitcher.setAttribute('aria-label', themeSwitcherLabel); |
| 68 | + |
| 69 | + if (focus) { |
| 70 | + themeSwitcher.focus(); |
| 71 | + } |
| 72 | + }; |
| 73 | + |
| 74 | + window |
| 75 | + .matchMedia('(prefers-color-scheme: dark)') |
| 76 | + .addEventListener('change', () => { |
| 77 | + const storedTheme = getStoredTheme(); |
| 78 | + if (storedTheme !== 'light' && storedTheme !== 'dark') { |
| 79 | + setTheme(getPreferredTheme()); |
| 80 | + } |
| 81 | + }); |
| 82 | + |
| 83 | + window.addEventListener('DOMContentLoaded', () => { |
| 84 | + showActiveTheme(getPreferredTheme()); |
| 85 | + |
| 86 | + document.querySelectorAll('[data-bs-theme-value]').forEach(toggle => { |
| 87 | + toggle.addEventListener('click', () => { |
| 88 | + const theme = toggle.getAttribute('data-bs-theme-value'); |
| 89 | + setStoredTheme(theme); |
| 90 | + setTheme(theme); |
| 91 | + showActiveTheme(theme, true); |
| 92 | + }); |
| 93 | + }); |
| 94 | + }); |
| 95 | +})(); |
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