Elements should not have tabindex greater than zero
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tabindex attribute must never have a value greater than 0 to prevent an unexpected tab order that can give the appearance of skipping some elements entirely.
The Algorithm, in Simple Terms
Ensures that explicit
tabindex attributes that are greater than 0 are never used
Why this is Important
tabindex with a value greater than 0 can create as many problems as it solves. It creates an unexpected tab order, which makes the page less intuitive and can give the appearance of skipping certain elements entirely.
How to Fix the Problem
There are two main ways to avoid using
tabindex with a value greater than 0. The first method is to change the
tabindex to 0. Note that this may change the order in which the user tabs through the elements. The second method is to remove the
tabindex entirely and modify the structure of the page so that a user tabbing through elements will reach them in the order initially desired.
- HTML 4