how do i add a hidden-xs class for blocks in the elemental theme?

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hello everybody

i'm trying to add a hidden-xs class for very small screens in the elemental theme. i'd like to have it shown in the dropdown menu of each block.

i'm confused where and how to add it in the page_theme.php or if have to add it in another less file. the class is defined as a less-file in
/css/build/bootstrap_3.2.0/responsive-utilities.less

thank you in advance for help.
keith

kfog
 
bcron replied on at Permalink Reply
bcron
Hello kfog
We are having the same problems and spending a lot of time figuring out. All we want is a place where we can easily add a custom class like "hidden-xs" on any block, like in 5.6.
A moblie first theme should be able to hide content according to importance. As far as i know it's a basic but powerful feature of Bootstrap.

It seems that nobody uses the responsive utilities, or is not sharing the information.
Is there anybody building a Bootstrap theme from scratch?

Any information is welcome
Regards
Bernie
andrew replied on at Permalink Reply
andrew
We will add a free form textarea for styles back in the next release.