code-snippetdark mode demo
html
<button id="themeToggle" class="fixed top-10 right-80">
<svg width="30px" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
<path
class="sun"
fill-rule="evenodd"
d="M12 17.5a5.5 5.5 0 1 0 0-11 5.5 5.5 0 0 0 0 11zm0 1.5a7 7 0 1 0 0-14 7 7 0 0 0 0 14zm12-7a.8.8 0 0 1-.8.8h-2.4a.8.8 0 0 1 0-1.6h2.4a.8.8 0 0 1 .8.8zM4 12a.8.8 0 0 1-.8.8H.8a.8.8 0 0 1 0-1.6h2.5a.8.8 0 0 1 .8.8zm16.5-8.5a.8.8 0 0 1 0 1l-1.8 1.8a.8.8 0 0 1-1-1l1.7-1.8a.8.8 0 0 1 1 0zM6.3 17.7a.8.8 0 0 1 0 1l-1.7 1.8a.8.8 0 1 1-1-1l1.7-1.8a.8.8 0 0 1 1 0zM12 0a.8.8 0 0 1 .8.8v2.5a.8.8 0 0 1-1.6 0V.8A.8.8 0 0 1 12 0zm0 20a.8.8 0 0 1 .8.8v2.4a.8.8 0 0 1-1.6 0v-2.4a.8.8 0 0 1 .8-.8zM3.5 3.5a.8.8 0 0 1 1 0l1.8 1.8a.8.8 0 1 1-1 1L3.5 4.6a.8.8 0 0 1 0-1zm14.2 14.2a.8.8 0 0 1 1 0l1.8 1.7a.8.8 0 0 1-1 1l-1.8-1.7a.8.8 0 0 1 0-1z"
></path>
<path
class="moon"
fill-rule="evenodd"
d="M16.5 6A10.5 10.5 0 0 1 4.7 16.4 8.5 8.5 0 1 0 16.4 4.7l.1 1.3zm-1.7-2a9 9 0 0 1 .2 2 9 9 0 0 1-11 8.8 9.4 9.4 0 0 1-.8-.3c-.4 0-.8.3-.7.7a10 10 0 0 0 .3.8 10 10 0 0 0 9.2 6 10 10 0 0 0 4-19.2 9.7 9.7 0 0 0-.9-.3c-.3-.1-.7.3-.6.7a9 9 0 0 1 .3.8z"
></path>
</svg>
</button>
<style>
#themeToggle {
border: 0;
background: none;
}
.sun {
fill: black;
}
.moon {
fill: transparent;
}
:global(.dark) .sun {
fill: transparent;
}
:global(.dark) .moon {
fill: white;
}
</style>
<script>
const theme = (() => {
if (typeof localStorage !== 'undefined' && localStorage.getItem('theme')) {
return localStorage.getItem('theme')
}
if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
return 'dark'
}
return 'light'
})()
if (theme === 'light') {
document.documentElement.classList.remove('dark')
} else {
document.documentElement.classList.add('dark')
}
window.localStorage.setItem('theme', theme)
const handleToggleClick = () => {
const element = document.documentElement
element.classList.toggle('dark')
const isDark = element.classList.contains('dark')
localStorage.setItem('theme', isDark ? 'dark' : 'light')
}
document
.getElementById('themeToggle')
.addEventListener('click', handleToggleClick)
</script><button id="themeToggle" class="fixed top-10 right-80">
<svg width="30px" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
<path
class="sun"
fill-rule="evenodd"
d="M12 17.5a5.5 5.5 0 1 0 0-11 5.5 5.5 0 0 0 0 11zm0 1.5a7 7 0 1 0 0-14 7 7 0 0 0 0 14zm12-7a.8.8 0 0 1-.8.8h-2.4a.8.8 0 0 1 0-1.6h2.4a.8.8 0 0 1 .8.8zM4 12a.8.8 0 0 1-.8.8H.8a.8.8 0 0 1 0-1.6h2.5a.8.8 0 0 1 .8.8zm16.5-8.5a.8.8 0 0 1 0 1l-1.8 1.8a.8.8 0 0 1-1-1l1.7-1.8a.8.8 0 0 1 1 0zM6.3 17.7a.8.8 0 0 1 0 1l-1.7 1.8a.8.8 0 1 1-1-1l1.7-1.8a.8.8 0 0 1 1 0zM12 0a.8.8 0 0 1 .8.8v2.5a.8.8 0 0 1-1.6 0V.8A.8.8 0 0 1 12 0zm0 20a.8.8 0 0 1 .8.8v2.4a.8.8 0 0 1-1.6 0v-2.4a.8.8 0 0 1 .8-.8zM3.5 3.5a.8.8 0 0 1 1 0l1.8 1.8a.8.8 0 1 1-1 1L3.5 4.6a.8.8 0 0 1 0-1zm14.2 14.2a.8.8 0 0 1 1 0l1.8 1.7a.8.8 0 0 1-1 1l-1.8-1.7a.8.8 0 0 1 0-1z"
></path>
<path
class="moon"
fill-rule="evenodd"
d="M16.5 6A10.5 10.5 0 0 1 4.7 16.4 8.5 8.5 0 1 0 16.4 4.7l.1 1.3zm-1.7-2a9 9 0 0 1 .2 2 9 9 0 0 1-11 8.8 9.4 9.4 0 0 1-.8-.3c-.4 0-.8.3-.7.7a10 10 0 0 0 .3.8 10 10 0 0 0 9.2 6 10 10 0 0 0 4-19.2 9.7 9.7 0 0 0-.9-.3c-.3-.1-.7.3-.6.7a9 9 0 0 1 .3.8z"
></path>
</svg>
</button>
<style>
#themeToggle {
border: 0;
background: none;
}
.sun {
fill: black;
}
.moon {
fill: transparent;
}
:global(.dark) .sun {
fill: transparent;
}
:global(.dark) .moon {
fill: white;
}
</style>
<script>
const theme = (() => {
if (typeof localStorage !== 'undefined' && localStorage.getItem('theme')) {
return localStorage.getItem('theme')
}
if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
return 'dark'
}
return 'light'
})()
if (theme === 'light') {
document.documentElement.classList.remove('dark')
} else {
document.documentElement.classList.add('dark')
}
window.localStorage.setItem('theme', theme)
const handleToggleClick = () => {
const element = document.documentElement
element.classList.toggle('dark')
const isDark = element.classList.contains('dark')
localStorage.setItem('theme', isDark ? 'dark' : 'light')
}
document
.getElementById('themeToggle')
.addEventListener('click', handleToggleClick)
</script>