113 lines
3.5 KiB
JavaScript
113 lines
3.5 KiB
JavaScript
const getStoredTheme = () => localStorage.getItem('theme')
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const setStoredTheme = theme => localStorage.setItem('theme', theme)
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export 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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// Define which themes are dark (for Bootstrap compatibility)
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const darkThemes = new Set([
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'dark',
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'ember',
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'midnight',
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'moonlight',
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'nord',
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'slate',
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])
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const setTheme = theme => {
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if (theme === 'auto') {
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const preferredTheme = window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light'
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document.documentElement.dataset.bsTheme = preferredTheme
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document.documentElement.dataset.theme = preferredTheme
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console.log(`Theme set to auto (resolved to: ${preferredTheme})`)
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} else {
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// Set Bootstrap's data-bs-theme to 'light' or 'dark' for Bootstrap's own styles
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const bsTheme = darkThemes.has(theme) ? 'dark' : 'light'
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document.documentElement.dataset.bsTheme = bsTheme
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// Set our custom data-theme attribute for our color schemes
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document.documentElement.dataset.theme = theme
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console.log(`Theme set to: ${theme} (Bootstrap: ${bsTheme})`)
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}
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}
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export const showActiveTheme = (theme, focus = false) => {
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const themeSwitcher = document.querySelector('#bd-theme')
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if (!themeSwitcher) {
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return
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}
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const themeSwitcherText = document.querySelector('#bd-theme-text')
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const activeThemeIcon = document.querySelector('.theme-icon-active svg')
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const btnToActive = document.querySelector(`[data-bs-theme-value="${theme}"]`)
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if (!btnToActive) {
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return
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}
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const btnIcon = btnToActive.querySelector('svg')
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if (!activeThemeIcon || !btnIcon) {
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return
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}
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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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// Clone the SVG icon from the active button to the theme switcher
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const clonedIcon = btnIcon.cloneNode(true)
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activeThemeIcon.parentNode.replaceChild(clonedIcon, activeThemeIcon)
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const themeSwitcherLabel = `${themeSwitcherText.textContent} (${btnToActive.textContent.trim()})`
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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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export function setupThemeToggleListener() {
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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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showActiveTheme(getPreferredTheme(), false)
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}
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export function loadAutoTheme() {
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(() => {
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'use strict'
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setTheme(getPreferredTheme())
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window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', () => {
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const storedTheme = getStoredTheme()
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// Only auto-switch if theme is set to 'auto'
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if (storedTheme === 'auto' || !storedTheme) {
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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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})
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})()
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}
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