susy 2.0 change columns at breakpoint - css

Question

I'm not using Compass
I prefer to use Breakpoint.scss
I'm on susy 2.0
I know there are lot of posts with this question but I'm having 0 luck finding any regarding Breakpoint.scss and Susy 2.0 on this topic.
#import "susy";
#import "breakpoint";
$medium: 800px;
$susy: (
columns: 6,
gutters: 3/4,
gutter-position: split
);
#include breakpoint($medium) {
$susy: layout(12 1/4 split);
}
body {
#include container(show);
#include breakpoint($medium) {
#include container(show);
}
}
Do I have to use susy-breakpoint or can something like this be achieved?
I want 6 columns at anything at/below 800px and 12 at/above 800px
I'm trying to stay DRY so adding a susy-breakpoint in my styles does not help.
I've also tried below code but I think I just have an error somewhere cause it's not working.
$susy: layout(6 1/4 split);
$small: 400px, 6 1/4 split;
$medium: 800px, 8 1/4 split;
$large: 1000px, 12 1/4 split;
#mixin media($size) {
#include susy-breakpoint($size...) {
#content;
}
}
body {
#include container(show);
#include media($small) {
#include container(show);
}
// debugging. didnt work either
#include susy-breakpoint($small...) {
#include container(show);
}
}

Answer 1

I don't know what your media mixin does, so I can't really comment on anything related to that. Your initial example doesn't work because Sass, CSS, and therefor Susy, are not aware of the DOM - or relationships between media-queries. When you change the value of $susy inside one media-query, that does not propagate to all similar media-query contexts. Because of that, you do have to set both the media-query and the desired layout every time you want a breakpoint to change the layout context.
susy-breakpoint is not the only way to do that, but it is the shortest. Here's the longhand:
body {
#include container(show);
#include breakpoint(800px) {
#include with-layout(8) { // default is set to 8-columns
#include container(show);
} // default is returned to global setting
}
}
Your $small breakpoint currently doesn't change anything, because it is identical to your default layout. The larger ones will change the layout context for nested code — though you can simplify: Since `1/4 split' gutters aren't changing at all, they don't need to be re-stated at every breakpoint.
$susy: layout(6 1/4 split);
$medium: 800px, 8;
body {
#include container(show);
#include susy-breakpoint($medium...) {
#include container(show);
}
}
That will be identical to the longhand above.