/
index.html
48 lines (45 loc) · 1.38 KB
/
index.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="author" content="Jose Antonio Gonzalez Rodriguez" />
<meta name="description" content="useDarkTheme" />
<meta name="theme-color" content="#262626" />
<meta name="keywords" content="React, Hooks" />
<meta
name="viewport"
content="width=device-width, initial-scale=1, shrink-to-fit=no"
/>
<meta
http-equiv="Content-Security-Policy"
content="upgrade-insecure-requests"
/>
<title>useDarkTheme</title>
</head>
<body>
<div id="app" role="main" />
<script>
let darkScheme = null
const storageKey = 'useDarkTheme'
const darkClass = 'dark'
const lightClass = 'light'
const localTheme = window.localStorage.getItem(storageKey)
function setTheme(theme) {
const addClass = theme === 'dark' ? darkClass : lightClass
const removeClass = theme === 'dark' ? lightClass : darkClass
document.body.classList.add(addClass)
document.body.classList.remove(removeClass)
}
if (window.matchMedia) {
darkScheme = window.matchMedia('(prefers-color-scheme: dark)')
}
if (localTheme) {
setTheme(localTheme)
} else if (darkScheme) {
setTheme(darkScheme.matches ? 'dark' : 'light')
} else {
setTheme('light')
}
</script>
</body>
</html>