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Add checkbox to toggle dark-mode

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This commit is contained in:
yude
2021-02-06 20:38:36 +09:00
parent 6bd9b71ff6
commit 86d04bbf22
4 changed files with 82 additions and 1 deletions
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5
pages/components/Layout.js
View File

@@ -2,12 +2,15 @@ import Head from "next/head"
import Link from "next/link" import Link from "next/link"
import "tailwindcss/tailwind.css"; import "tailwindcss/tailwind.css";
import React, { useEffect, useState } from 'react' import React, { useEffect, useState } from 'react'
import { ThemeProvider } from "./themeContext"
import Toggle from "./toggle"
const Layout = (props) => { const Layout = (props) => {
const { title, children } = props const { title, children } = props
const siteTitle = "yude.jp" const siteTitle = "yude.jp"
return ( return (
<div className="page"> <div className="page">
<ThemeProvider>
<Head> <Head>
<title>{title ? `${title} - ${siteTitle}` : siteTitle}</title> <title>{title ? `${title} - ${siteTitle}` : siteTitle}</title>
<link rel="icon" href="/static/images/favicon.ico" /> <link rel="icon" href="/static/images/favicon.ico" />
@@ -33,11 +36,13 @@ const Layout = (props) => {
<p className="text-sm text-gray-700 font-bold mb-2"> <p className="text-sm text-gray-700 font-bold mb-2">
This page is licensed under the MIT License. / Powered by Tailwind CSS and Next.js. This page is licensed under the MIT License. / Powered by Tailwind CSS and Next.js.
</p> </p>
<Toggle />
</div> </div>
</div> </div>
</div> </div>
</footer> </footer>
</body> </body>
</ThemeProvider>
</div> </div>
) )
} }

2
pages/components/Navbar.js
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@@ -16,7 +16,7 @@ const Navbar = () => {
<nav className='flex items-center flex-wrap p-3'> <nav className='flex items-center flex-wrap p-3'>
<Link href='/'> <Link href='/'>
<a className='inline-flex items-center p-2 mr-4'> <a className='inline-flex items-center p-2 mr-4'>
<span className='text-xl text-black font-bold tracking-wide'> <span className='text-xl text-black font-bold tracking-wide dark:text-white'>
yude.jp yude.jp
</span> </span>
</a> </a>

53
pages/components/themeContext.js Normal file
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@@ -0,0 +1,53 @@
import React from 'react'
const getInitialTheme = _ => {
if (typeof window !== "undefined" && window.localStorage) {
const storedPrefs = window.localStorage.getItem("color-theme")
if (typeof storedPrefs === "string") {
return storedPrefs
}
const userMedia = window.matchMedia("(prefers-color-scheme: dark)")
if (userMedia.matches) {
return "dark"
}
}
// If you want to use light theme as the default, return "light" instead
return "dark"
}
const ThemeContext = React.createContext()
export default ThemeContext
export const ThemeProvider = ({ initialTheme, children }) => {
const [theme, setTheme] = React.useState(getInitialTheme)
const rawSetTheme = theme => {
const root = window.document.documentElement
const isDark = theme === "dark"
root.classList.remove(isDark ? "light" : "dark")
root.classList.add(theme)
localStorage.setItem("color-theme", theme)
}
if (initialTheme) {
rawSetTheme(initialTheme)
}
React.useEffect(
_ => {
rawSetTheme(theme)
},
[theme]
)
return (
<ThemeContext.Provider value={{ theme, setTheme }}>
{children}
</ThemeContext.Provider>
)
}

23
pages/components/toggle.js Normal file
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@@ -0,0 +1,23 @@
import React from 'react'
import ThemeContext from './themeContext'
const Toggle = () => {
const { theme, setTheme } = React.useContext(ThemeContext)
function isDark() {
return theme === "dark"
}
return (
<label>
<input
type="checkbox"
checked={isDark()}
onChange={e => setTheme(e.target.checked ? "dark" : "light")}
></input>
ダーク モード
</label>
)
}
export default Toggle