Solving issues with Tailwind CSS class names within Next.js

I'm currently working on a project built with Next.js and styled using Tailwind CSS. Unfortunately, I've run into an issue concerning classNames in my page.js file. I've double-checked my import statements, but the error persists. I'm seeking assistance in identifying the root cause of this problem and finding a solution. Any insights or help would be highly appreciated.

Code Snippet:

import Link from "next/link";

const getSeries = async() => {
    try {
      const res = await fetch('http://localhost:3000/api', {cache: "no-store"});
      if (!res.ok) {
        throw new Error("Fetching failed");
      };
      return res.json();
    } catch (error) {
      console.error("Series Collection: c%FAILED","color:red",error);
    }
  } 
  

export default async function Series() {
    const {series} = await getSeries();

    return (
        <main>
            {series?.map((serie) => {
                return (
                    <div className="flex flex-col">
                    <div className="flex justify-between">
                    <div>
                        <div className="flex flex-col justify-start">
                        <h1 className="text-white font-extrabold pt-2 px-2 mt-2 mx-2">{serie.name}</h1>
                        <div className="flex justify-between pb-2 px-2 mt-2 mx-2">
                            <p className="text-orange-300 md:star_gradient font-extrabold">{serie.author}</p>
                            <p className="opacity-80 text-white font-extrabold ">{serie.rate}</p>
                        </div>
                        </div>
                    </div>
                    <Link href={`@/app/${serie}`} className="rounded opacity-80 bg-blue-500 text-center p-2 m-2 text-white font-extrabold shadow-sm">
                        See More
                    </Link> 
                    </div>
                    <div className="flex carousel">
                      {serie.episodes?.map((episode) => {
                        <Link className={`bg-gradient-to-b from-[url("${episode.thumbnail}")] to-black flex align-end justify-end p-2 m-2 h-[300px] w-[640px] rounded shadow-md`} href={`@/app/${serie}/${episode.id}`}>
                        <h1>{episode?.name}</h1>
                        </Link>
                      })}
                    </div>
                </div>
            )})}
        </main>
  )
} 

Error Message:

./app/globals.css:4:0
Module not found: Can't resolve './{'

https://nextjs.org/docs/messages/module-not-found

Import trace for requested module:
./app/globals.css

I have a suspicion that the issue is linked to the classNames in the page.js file, despite the correctness of my import statements. Any suggestions on how to troubleshoot and fix this issue would be of great help. Thank you in advance.

Note: The inclusion of the image is crucial as it is an integral part of my UI design.

Answer №1

It appears that the issue may stem from the

from-[url("${episode.thumbnail}")]
syntax in Tailwind CSS. This would result in Tailwind generating a rule like the following:

.from-\[url\(\"\$\{episode.thumbnail\}\"\)\] {
  --tw-gradient-from: url("${episode.thumbnail}") var(--tw-gradient-from-position);
  --tw-gradient-to: rgb(255 255 255 / 0) var(--tw-gradient-to-position);
  --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to);
}

This could potentially cause your build system to try to interpret ${episode.thumbnail} as a path in some way.

Additionally, it is important to note that Tailwind does not support constructing class names dynamically through string concatenation or interpolation. As stated in the documentation:

It is crucial to define class names as complete strings in your source files in order for Tailwind to generate the corresponding CSS. Dynamically constructing class names using interpolation will result in Tailwind failing to recognize and generate the classes.

Avoid dynamically constructing class names:

<div class="text-{{ error ? 'red' : 'green' }}-600"></div>

In the provided example, the class names text-red-600 and text-green-600 are incomplete, leading to Tailwind not generating them. To ensure proper CSS generation, always use complete class names:

Always use complete class names

<div class="{{ error ? 'text-red-600' : 'text-green-600' }}"></div>

Furthermore, utilizing a url() value for from- classes would be illogical since it would resolve to a linear-gradient() color stop, where a url() value is not valid. Essentially, attempting to apply CSS equivalent to

bg-gradient-to-b from-[url("${episode.thumbnail}")] to-black
results in invalid CSS:

selector {
  background-image: linear-gradient(to bottom, url("${episode.thumbnail}"), black);
}

To address this issue, it is recommended to use a color value for the from- class instead.

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