Role Attribute 1.0. An attribute to support the role classification of elements W3C Recommendation 28 March 2013 This version:
CSS - units and values. CSS - position. In order to make more complex layouts, we need to discuss the position property.
It has a bunch of possible values, and their names make no sense and are impossible to remember. Let's go through them one by one, but maybe you should bookmark this page too. static static is the default value.
Visibility. Width-height-margins. Text. Background-border-img. Layout. Opacity.