not able to use custom classes in @apply in scss file tailwind nextjs project?

Question

I'm trying to use a custom class overflow:inherit as @apply overflow-inherit in tailwind next.js project but it's throwing error. However, I can @apply pre-built tailwind classes like @apply flex flex-col md:h-full h-screen; but not custom.

Full repo: https://github1s.com/GorvGoyl/Personal-Site-Gourav.io

tailwind.scss:

@tailwind base;
@tailwind components;
@tailwind utilities;

@layer utilities {
  @variants responsive {
    .overflow-inherit {
      overflow: inherit;
    }
  }
}

project.module.scss:

.css {
  :global {
    .wrapper-outer {
      @apply overflow-inherit; //trying to apply custom utility
    }
  }
}

Error:

wait  - compiling...
event - build page: /next/dist/pages/_error
error - ./layouts/css/project.module.scss:4:6
Syntax error: C:\Users\1gour\Personal-Site\project.module.scss The `overflow-inherit` class does not exist, but `overflow-hidden` does. If you're sure that `overflow-inherit` exists, make sure that any `@import` statements are being properly processed before Tailwind CSS sees your CSS, as `@apply` can only be used for classes in the same CSS tree.

  2 |   :global {
  3 |     .wrapper-outer {
> 4 |       @apply overflow-inherit;
    |      ^
  5 |     }
  6 |   }

postcss.config.js:

module.exports = {
  plugins: {
    tailwindcss: {},
    autoprefixer: {},
  },
};

• "next": "^10.0.7",
• "tailwindcss": "^2.0.3",
• "sass": "^1.32.8",
• "postcss": "^8.2.6",

Answer 1

I had the same problem on my Laravel project.

I decided that postcss is not enough for me. So in the webpack.mix.js I deleted the following

mix.postCss('resources/css/app.css', 'public/css', [
    require('postcss-import'),
    require('tailwindcss'),
    require('autoprefixer'),
]);

and replaced it with sass like this

mix.sass("resources/css/app.scss", "public/css").options({
    postCss: [
        require('postcss-import'),
        require('tailwindcss'),
        require('autoprefixer'),
    ], });

Now, I got a number of cool features including the one you want

I don't even need to use @layer

in my scss file I can combine @apply and @extend and it works

.btn-my-theme{
    @apply rounded border py-2 px-3 shadow-md hover:shadow-lg;
}

.btn-my-primary{
    @extend .btn-my-theme;
    @apply text-blue-600 bg-blue-200 hover:bg-blue-100 border-blue-500;
}

.btn-my-secondary{
    @extend .btn-my-theme;
    @apply text-gray-600 bg-gray-200 hover:bg-gray-100 border-gray-500;
}