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Luke Lee
7,577 PointsDo lots of display:none slow page speed?
When design responsive design, people like to use display:none for certain blocks. I think page still load these elements right?
3 Answers

Sri Kadimisetty
9,770 PointsYes. the element is loaded.
The style display:none
removes the element from displayingg into the page, when the styles are applied by the browser (post page download). However that particular element will still be available for any Javascript DOM manipulation etc.
Kazimierz Matan
13,257 PointsSri is right. These non-displayed elements are still loaded into DOM, content of them is loaded too. Page speed would be similar with or without "none" value of display property.

James Barnett
39,199 PointsIn order to change that you would need to use a server-side language like PHP to do some device detection to know what content to serve up.
That's what some people have started calling RESS (Responsive + Server Side)
further reading
http://bradfrost.github.io/this-is-responsive/resources.html#ress