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How to Correctly Use Template Literals for Dynamic Class Modification in Tailwind CSS?

Posted on 2025-03-24
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How to Correctly Use Template Literals for Dynamic Class Modification in Tailwind CSS?

Using Template Literals for Dynamic Class Modification in TailwindCSS

When attempting to dynamically change classes using the following code:

className=" absolute inset-0 ${click ? translate-x-0 : -translate-x-full } 
        transform  z-400 h-screen w-1/4 bg-blue-300 "

you may encounter an issue. The correct way to achieve this using template literals is:

className={`absolute inset-0 ${click ? 'translate-x-0' : '-translate-x-full'} transform z-400 h-screen w-1/4 bg-blue-300`}

Alternatively, you can use string concatenation to define your className:

className={'absolute inset-0 '   (click ? 'translate-x-0' : '-translate-x-full')   ' transform z-400 h-screen w-1/4 bg-blue-300'}

It's crucial to avoid string concatenation for individual class names, e.g.:

className={`text-${error ? 'red' : 'green'}-600`}

Instead, select complete class names as follows:

className={`${error ? 'text-red-600' : 'text-green-600'}`}
className={error ? 'text-red-600' : 'text-green-600'}

Tailwind will preserve complete class names in production builds.

Consider utilizing libraries like classnames, clsx, or Tailwind-specific solutions like twin.macro, twind, or xwind for further flexibility.

Additional Resources:

  • [React.js Conditionally Applying Class Names](https://reactjs.org/docs/dom-elements.html#conditional-class-names-and-styles)
  • [How to Dynamically Add a Class to Manual Class Names?](https://stackoverflow.com/questions/24217807/how-to-dynamically-add-a-class-to-manual-class-names)
  • [Correct Way to Handle Conditional Styling in React](https://stackoverflow.com/questions/40787489/correct-way-to-handle-conditional-styling-in-react)
  • [Embedding Expressions in JSX](https://reactjs.org/docs/jsx-in-depth.html#embedding-expressions-in-jsx)
  • [Template Literals - MDN](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Template_literals)
  • [Optimizing for Production - Writing Purgeable HTML - Tailwind CSS](https://tailwindcss.com/docs/optimizing-for-production#writing-purgeable-html)
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