Which of the following capabilities eliminates the need for inline styles?

The capability that eliminates the need for inline styles is the use of custom style sheets and custom styles. By utilizing these, developers can define styles in a centralized manner, which promotes consistency across the application and reduces redundancy. This approach allows for the separation of style and content, meaning that styles can be applied globally or selectively without the clutter of inline styles directly within HTML elements.

Custom style sheets enable developers to maintain a clean and manageable codebase, making it easier to implement design changes in one location instead of updating multiple elements individually. This is particularly advantageous for maintaining and evolving applications over time, as style updates can be made in the stylesheets without the need to modify individual components directly.

In contrast, while component tabs in skin rules, CSS class fields on layout panels, and application skin rules provide useful functionalities related to UI layout and theming, they do not directly address the management of inline styles as effectively as custom style sheets do. They may help in structuring the UI and applying pre-defined styles but do not replace the necessity for inline styles in the same way as custom styles and stylesheets do.