Which principle does bypass blocks fall under?

Bypass blocks fall under the principle of Operable. This principle focuses on ensuring that all users can interact with user interface components and navigate through the content effectively. Bypass blocks specifically refer to navigation tools that allow users, especially those using assistive technologies like screen readers, to easily skip repetitive content, such as menus, and navigate directly to the main content of a page.

By providing a mechanism to bypass blocks, websites enhance the operability of their interfaces, allowing all users, regardless of their abilities, to efficiently access the information they need. This is particularly important for individuals with disabilities, as it contributes significantly to their ability to use web content effectively. The Operable principle encompasses various aspects of user navigation and interaction, making it essential for accessibility.

The other principles—Perceivable, Understandable, and Robust—focus on other aspects of accessibility, such as content visibility, clarity of information, and compatibility with various technologies. However, bypassing blocks directly relates to the ability to navigate and interact effectively with a website, solidifying its connection to the Operable principle.