/mdn-git/developer.mozilla.org/en-US/docs/Web/API/CSS_Object_ModelCSS_Object_Model
CSS_Declaration CSS_Declaration_Block Determining_the_dimensions_of_elements Managing_screen_orientation Using_dynamic_styling_information
/mdn-git/developer.mozilla.org/en-US/docs/Web/API/CSS_Object_Model/Determining_the_dimensions_of_elementsDetermining_the_dimensions_of_elements