What is the best way to "add" a CSS class to a lit-element component?

lit-element uniquely manages CSS encapsulation by allowing styling only through custom CSS variables.

Contrarily, tailwindcss applies styles via classes and there seems to be no external injection method available.

I aim to create a custom lit-component that remains independent of tailwind. It should have minimal styling and provide users with full customization options.

Currently, my solution involves passing classes as a property and applying them using classMap. However, the issue lies in determining where these classes should be applied without adding them individually to each element, which would be impractical. Moreover, integrating tailwind may pose challenges due to style encapsulation.

Answer №1

So, I understand that you're looking to allow users to add classes to specific sections within the custom element you created?

One approach could be to utilize slots in your component, enabling users to insert elements into these slots as children of your component. This way, users have direct control over the classes they want to apply, and styling will be applied since the children become part of the light DOM.

While providing classes through properties may seem cumbersome and result in styling issues unless shadow DOM usage is bypassed by modifying createRenderRoot, which is not advisable.

Remember, CSS custom properties aren't the only method for allowing users to style components. You can also incorporate part attributes, allowing users to use ::part() pseudo-elements for styling customization. If users are comfortable with CSS instead of predefined tailwind classes, this could grant them greater flexibility in styling your component. Refer to https://developer.mozilla.org/en-US/docs/Web/CSS/::part for more information.

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