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The tab order must follow the logical order of reading the page.
This means that when an interactive element immediately precedes another during a visual browsing of the page, the focus must move to the second element immediately after having left the first.
Except in very rare cases where the interface is totally stable and controlled for a long period of time, make sure you do not use the tabindex
attribute with a value of more than 0; otherwise, there is a risk of upsetting the tab order logic in the page.