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feat: synchronize browser theme color with website theme

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- Add browser theme color synchronization via meta[theme-color]
- Update theme color on:
  - Initial page load
  - Theme toggle
  - System theme change
  - Page navigation
  - Browser history navigation
  - Page restore from cache
This commit is contained in:
radishzzz 2025-02-07 10:53:05 +00:00
parent 162e7ada22
commit e99e26d62c
1 changed files with 42 additions and 6 deletions
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48
src/layouts/Head.astro
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@ -20,7 +20,7 @@ const { commentURL = '', imageHostURL = '', customGoogleAnalyticsURL = '', custo
<head>
<!-- Basic info -->
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta name="viewport" content="width=device-width, initial-scale=1, viewport-fit=cover" />
{favicon.toLowerCase().endsWith('.webp') && <link rel="icon" type="image/webp" href={favicon} />}
{favicon.toLowerCase().endsWith('.svg') && <link rel="icon" type="image/svg+xml" href={favicon} />}
{favicon.toLowerCase().endsWith('.png') && <link rel="icon" type="image/png" href={favicon} />}
@ -28,9 +28,7 @@ const { commentURL = '', imageHostURL = '', customGoogleAnalyticsURL = '', custo
<meta name="description" content={postDescription || description} />
<meta name="author" content={author} />
<meta name="generator" content={Astro.generator} />
<meta name="color-scheme" content="light dark" />
<meta name="theme-color" content={lightMode} media="(prefers-color-scheme: light)" />
<meta name="theme-color" content={darkMode} media="(prefers-color-scheme: dark)" />
<meta name="theme-color" content={lightMode} />
<ClientRouter />
<!-- Preload -->
@ -77,7 +75,23 @@ const { commentURL = '', imageHostURL = '', customGoogleAnalyticsURL = '', custo
{baidu && <meta name="baidu-site-verification" content={baidu} />}
<!-- Theme Toggle -->
<script is:inline define:vars={{ defaultMode: themeConfig.color.mode }}>
<script is:inline define:vars={{ defaultMode: themeConfig.color.mode, lightMode, darkMode }}>
function getCurrentTheme() {
return document.documentElement.classList.contains('dark')
}
function updateThemeColor(isDark) {
const metaThemeColor = document.querySelector('meta[name="theme-color"]')
if (metaThemeColor) {
metaThemeColor.setAttribute('content', isDark ? darkMode : lightMode)
}
}
function syncTheme() {
const isDark = getCurrentTheme()
updateThemeColor(isDark)
}
function initTheme() {
const theme = (() => {
if (typeof localStorage !== 'undefined' && localStorage.getItem('theme')) {
@ -88,7 +102,10 @@ function initTheme() {
}
return defaultMode
})()
document.documentElement.classList.toggle('dark', theme === 'dark')
const isDark = theme === 'dark'
document.documentElement.classList.toggle('dark', isDark)
updateThemeColor(isDark)
}
initTheme()
@ -96,6 +113,25 @@ initTheme()
window.matchMedia('(prefers-color-scheme: dark)').addEventListener('change', (e) => {
if (!localStorage.getItem('theme')) {
document.documentElement.classList.toggle('dark', e.matches)
updateThemeColor(e.matches)
}
})
document.addEventListener('astro:before-swap', (event) => {
const isDark = getCurrentTheme()
event.newDocument.documentElement.classList.toggle('dark', isDark)
const metaThemeColor = event.newDocument.querySelector('meta[name="theme-color"]')
if (metaThemeColor) {
metaThemeColor.setAttribute('content', isDark ? darkMode : lightMode)
}
})
document.addEventListener('theme-changed', syncTheme)
document.addEventListener('astro:after-swap', syncTheme)
window.addEventListener('popstate', syncTheme)
window.addEventListener('pageshow', (event) => {
if (event.persisted) {
syncTheme()
}
})
</script>