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9.11 Level AA − WCAG 2.0 Success Criterion 3.2.4 − Consistent Identification

For all items that have the same functionality, ensure they use the same label. For example, a "Buy Now" button on one webpage should be identically labelled as a "Buy Now" button on another webpage so that the user knows these buttons would perform the same function.

Before Rectification

A webpage sample containing two buttons for the same function but having different label descriptions.

In the example above, there are two buttons each having a different label. This could cause confusion for some users, especially for those using screen readers, who may not be able to take note of the similarities between these two buttons.

After Rectification

A webpage sample containing two buttons for the same function with same label descriptions.

The two "Buy Now" buttons are consistent above and it is clear that both would perform the same function.

Link to Live Example for 3.2.4

WCAG 2.0 Reference:

http://www.w3.org/TR/UNDERSTANDING-WCAG20/consistent-behavior-consistent-functionality.html