12.3. Ensure that the tab order follows the logical reading order
The tab order should logically follow the visual order of the page.
In other words, if an interactive element follows another interactive element in the visual presentation of the page, the focus should also move from the first to the second element in the same order.
Warning
Do not use positive values (value above 0) on the tabindex attribute because it can disrupt the natural tab order of the page.
Note
In some rich interface components such as tab panels, the arrow keys rather than the Tab key are used to navigate from one interactive element to another.