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postcss-plugin-darkmode

v0.0.5

Published

PostCSS plugin for an @darkmode AtRule

Downloads

8

Readme

postcss-plugin-darkmode

PostCSS plugin for an @darkmode AtRule.

The plugin allows you to toggle light and dark mode at different levels of the DOM, without requiring any JavaScript at all! It works by extracting properties used in Light & Dark mode into CSS variables.

<html>
  <body> <!-- Uses the users color scheme, no theme is specified -->
    <div data-theme="dark"> <!-- This element, and all descendants use the dark theme -->
      <div> <!-- So this is dark! -->
        <div></div> <!-- And this! -->
        <div data-theme="light"> <!-- But this specifies the light theme, so it and it's children are light -->
          <div> </div> <!-- Light too! -->
        </div>
      </div>
    </div>
  </body>
</html>

Examples

CSS

.foo {
  padding: 12px;
  background: pink;

  display: flex;
  flex-direction: column;
}

@theme (dark) {
  .foo {
    background: red;
    flex-direction: row;
  }
}
:root, [data-theme=light] {
  --\.foo_background: pink;
  --\.foo_flex-direction: column;
}

[data-theme=dark] {
  --\.foo_background: red;
  --\.foo_flex-direction: row;
}

@media (prefers-color-scheme: dark) {
  :root {
    --\.foo_background: red;
    --\.foo_flex-direction: row;
  }
}

.foo {
  padding: 12px;
  display: flex;
  background: var(--\.foo_background);
  flex-direction: var(--\.foo_flex-direction);
}

Sass

.foo {
  padding: 12px;
  background: pink;
  display: flex;
  flex-direction: column;

  @theme (dark) {
    background: red;
    flex-direction: row;
  }
}
:root, [data-theme=light] {
  --\.foo_background: pink;
  --\.foo_flex-direction: column;
}

[data-theme=dark] {
  --\.foo_background: red;
  --\.foo_flex-direction: row;
}

@media (prefers-color-scheme: dark) {
  :root {
    --\.foo_background: red;
    --\.foo_flex-direction: row;
  }
}

.foo {
  padding: 12px;
  display: flex;
  background: var(--\.foo_background);
  flex-direction: var(--\.foo_flex-direction);
}

Options

| | Default | Description | Example Alternative | -------------- | ------- | ----------- | ------ | Light Selector | [data-theme=light] | Used to select an elements with light mode forced | .light | Dark Selector | [data-theme=dark] | Used to select elements with dark mode forced. | .dark

Usage

Step 1: Install plugin:

npm install --save-dev postcss postcss-plugin-darkmode

Step 2: Check you project for existed PostCSS config: postcss.config.js in the project root, "postcss" section in package.json or postcss in bundle config.

If you do not use PostCSS, add it according to official docs and set this plugin in settings.

Step 3: Add the plugin to plugins list:

module.exports = {
  plugins: [
+   require('postcss-plugin-darkmode'),
    require('autoprefixer')
  ]
}