How do screen readers handle columns of text created by floating elements?

Screen readers interact with web content by parsing the Document Object Model (DOM) structure to present information to users. When columns of text are created using floating elements, the screen reader typically reads each column in the order that they appear in the DOM. This sequential reading allows users to understand the content's structure as intended by the developer.

The reason this method works best is that screen readers rely on the underlying HTML code and its order rather than the visual layout presented on the screen. As a result, a user who relies on a screen reader will hear each column's content sequentially, allowing them to navigate through the information effectively, without confusion about how the text might visually appear in separate columns.

This understanding highlights the importance of thoughtful DOM structure and using appropriate markup to ensure that content is presented logically to assistive technologies. Proper use of semantic HTML can also enhance the user experience for those using screen readers.