ments and attributes become "deprecated" because of existing implementations of the older feature.
This indicates that the feature is allowed and expected to be supported by conforming browsers.
However, those deprecated features may soon become obsolete, will be removed in future specifications,
and will no longer be expected to be supported by browsers and assistive technology used by persons with disabilities.
So, it is prudent to update the code to avoid deprecated features. 

For example, 
developers s