Why Can't I Use Dynamic Class Names with Tailwind CSS?

Understanding the Limitations of Dynamic Class Names in Tailwind CSS

Issue:

When attempting to pass a context variable as a value to a Tailwind CSS class name, the operation fails. This issue arises due to the inability of Tailwind to extract dynamic class names.

Explanation:

Tailwind CSS operates on the principle of identifying class names as complete, unbroken strings within the codebase. If class names are constructed dynamically or concatenated, Tailwind cannot recognize them and consequently fails to generate the corresponding CSS. This behavior is explicitly outlined in the official documentation, which discourages the construction of class names dynamically.

Solution:

To address this challenge, ensure that the class names utilized are complete and not composed of dynamic parts. Consider defining complete class names in your context, such as the following example:

const colors = {
  // ...
  secondary: darkTheme ? "bg-[#FFFFFF]" : "bg-[#FFFFFF]",
  // ...
};

Alternatively, you may consider using the style attribute to assign dynamic values:

<p className="text-text-white">

By adhering to these guidelines, Tailwind CSS will accurately identify and generate the desired CSS rules.

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