快速为网站添加暗黑模式（DarkMode.js）

1.Add a dark-mode / night-mode to your website in a few seconds

This library uses the css ​​mix-blend-mode​​ in order to bring Dark-mode to any of your websites. Just copy paste the snippet and you will get a widget to turn on and off the dark-mode. You can also use it without the widget programmatically. The plugin is lightweight, built in VanillaJS. It also uses localstorage by default so your last setting will be remembered !

 ​

2.Features

• • 
    
• Widget appears automatically
• Saving users choice
• Automatically shows Darkmode if the OS preferred theme is dark (if the browsers supports ​​prefers-color-scheme​​)
• Can be used programmatically without widget
  • 
    

3.Demo

Check out the demo in these websites (there is a button on the bottom, right hand corner, just press it!):

• • 
    
• On this website
• ​​https://tradivegan.com​​ (with custom label)
• ​​https://what.toeat.in​​ (without custom label)
• ​​https://www.kanbanote.com​​ (without the widget, once logged in)
• ​​https://www.sandoche.com​​ (with custom label)
• ​​https://pilab.dev​​ (without the widget, with a custom toggle button)
  • 
    

4.Wordpress plugins

If you are using Wordpress you may want have a look to these plugins based on Darkmode.js:

• • 
    
• ​​Blackout: Dark Mode Widget – WordPress plugin | WordPress.org​​
• ​​Dark Mode for WordPress – WordPress plugin | WordPress.org​​

5.Nuxt.js module

If you are using Nuxt.js there is a module for Darkmode.js:

• ​​GitHub - sandoche/nuxtjs-darkmode-js-module: ???? Add darkmode / nightmode to your nuxt project in a few seconds​​

6.How to use

Darkmode.js is very easy to use, just copy paste the following code or use the npm package.

7.Easy way (using the JSDelivr CDN)

Just add this code to your html page:

<script src="https://cdn.jsdelivr.net/npm/darkmode-js@1.5.7/lib/darkmode-js.min.js"></script>
<script>
  function addDarkmodeWidget() {
    new Darkmode().showWidget();
  }
  window.addEventListener('load', addDarkmodeWidget);
</script>

8.Using NPM

npm install darkmode-js

Then add the following javascript code:

import Darkmode from 'darkmode-js';

new Darkmode().showWidget();

9.Options

Here are the option availables:

const options = {
  bottom: '64px', // default: '32px'
  right: 'unset', // default: '32px'
  left: '32px', // default: 'unset'
  time: '0.5s', // default: '0.3s'
  mixColor: '#fff', // default: '#fff'
  backgroundColor: '#fff',  // default: '#fff'
  buttonColorDark: '#100f2c',  // default: '#100f2c'
  buttonColorLight: '#fff', // default: '#fff'
  saveInCookies: false, // default: true,
  label: '????', // default: ''
  autoMatchOsTheme: true // default: true
}

const darkmode = new Darkmode(options);
darkmode.showWidget();

10.Methods

If you don't want to show the widget and enable/disable Darkmode programatically you can use the method ​​toggle()​​​. You can also check if the darkmode is activated with the method ​​isActivated()​​. See them in action in the following example.

const darkmode =  new Darkmode();
darkmode.toggle();
console.log(darkmode.isActivated()) // will return true

11.Override style

• • 
    
• A CSS class ​​darkmode--activated​​ is added to the body tag when the darkmode is activated. You can take advantage of it to override the style and have a custom style
• Use the class ​​darkmode-ignore​​ where you don't want to apply darkmode
• You can also add this style: ​​isolation: isolate;​​ in your css, this will also ignore the darkmode.
• It is also possible to revert the dark-mode with this style ​​mix-blend-mode: difference;​​
  • 
    

12.Examples

.darkmode--activated p, .darkmode--activated li {
  color: #000;
}

.button {
  isolation: isolate;
}

.darkmode--activated .logo {
  mix-blend-mode: difference;
}

<span class="darkmode-ignore">????<span>

13.Debug

If it does not work you may have to add the following code, but this will invalidate the classes to override.

.darkmode-layer, .darkmode-toggle {
  z-index: 500;
}

14.Browser compatibility

This library uses the CSS ​​mix-blend-mode: difference;​​​ in order to provide the Dark Mode. It may not be compatible with all the browsers. Therefore the widget has been hidden in Internet Explorer and Edge. This library also uses ​​prefers-color-scheme: dark​​ to automatically enable the Dark Mode if the OS prefered theme is dark.

Check the compatibility here:

• • 
    
• ​​https://caniuse.com/#search=mix-blend-mode​​
• https://caniuse.com/#search=prefers-color-scheme (to activate Dark Mode automatically)
  • 
    

15.Development

• • 
    
• ​​yarn build​​​ or ​​npm run build​​​ - produces production version of your library under the ​​lib​​ folder
• ​​yarn dev​​​ or ​​npm run dev​​ - produces development version of your library and runs a watcher
• ​​yarn test​​​ or ​​npm run test​​ - it runs the tests ????
• ​​yarn test:watch​​​ or ​​npm run test:watch​​ - same as above but in a watch mode
  •