When building Hotwire Native apps, often you will want to have different CSS for native and desktop apps.

We can achieve it by addin custom variants like non-turbo-native: & turbo-native:.

<div class="non-turbo-native:hidden">
  Visible only on Native
</div>
<div class="turbo-native:hidden">
  Visible only on Desktop
</div>

CSS # 

/* application.css */
body.turbo-native .turbo-native:hidden {
  display: none;
}

<body class="<%%= "turbo-native" if turbo_native_app? %>">
<h1 class="turbo-native:hidden">Hello, world!</h1>

Source: masilotti.com

Tailwind #

To enable this, update your tailwind config file:

# config/tailwind.config.js
const defaultTheme = require('tailwindcss/defaultTheme')
+const plugin = require('tailwindcss/plugin')

module.exports = {
  plugins: [
    require('@tailwindcss/forms'),
    require('@tailwindcss/aspect-ratio'),
    require('@tailwindcss/typography'),
    require('@tailwindcss/container-queries'),
+    plugin(function({ addVariant }) {
+      addVariant("turbo-native", "html[data-turbo-native] &"),
+      addVariant("non-turbo-native", "html:not([data-turbo-native]) &")
+    })
  ],
}

And conditionally add data-turbo-native to your <html> tag:

# app/helpers/application_helper.rb
module ApplicationHelper
  def platform_identifier
    'data-turbo-native' if turbo_native_app?
  end
end

# app/views/application.html.erb
-<html>
+<html <%= platform_identifier %>>

That’s it! Now you can apply the CSS variant:

<div class="non-turbo-native:hidden">
  Visible only on Native
</div>
<div class="turbo-native:hidden">
  Visible only on Desktop
</div>

<div class="turbo-native:bg-black turbo-native:text-white">
  Turbo Native
</div>
<div class="non-turbo-native:bg-black non-turbo-native:text-white">
  Non Turbo Native
</div>

Enable for a block # 

// config/tailwind.config.js
      addVariant('mobile', '&[data-turbo-native="true"]'),
      addVariant('non-mobile', '&[data-turbo-native="false"]'),

<div data-turbo-native="true" class="mobile:bg-black non-mobile:bg-red-400">
  This is mobile
</div>

<div data-turbo-native="false" class="mobile:bg-black non-mobile:bg-red-400">
  This is non-mobile
</div>

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That’s it for now!