Using SASS & reference for OOCSS - css

Usually i use LESS for my projects but now im trying to go with SASS.
In LESS i do things like this
.module {
background-color: blue;
&-title {
color: black;
}
&-type-2 {
background-color: red;
}
}
and the output CSS will be
.module {
background-color: blue;
}
.module-title {
color: black;
}
.module-type-2 {
background-color: red;
}
In SASS wont work, there is someway to do it in SASS?

As of Sass 3.3, you can do that with the following syntax:
.block{
&__element {
// ...
}
&--modifier {
// ...
}
}

Related

SCSS Nesting and extend

When I do a yarn build of the scss below I can only see the .select-list__item:hover in the compiled css, I am not seeing anything else from the class such as .select-list__item--selected I am not sure what the issue here is.
%select-list__item {
&:hover {
background: red;
}
&--selected,
&--selected:nth-child(2n),
&--selected:hover {
background: #00FF00;
}}
.select-list__item {
#extend %select-list__item;}
I believe it is to do with how placeholders (ie: %chosen-name) are meant to be used.
Although this is not explicitly pointed out in the documentation they are meant to be small bits that are reusable.
At my company, we use one for our generic button styles (margin, padding, font) and we extend that into all of our buttons (primary, secondary, tertiary).
A potential solution for your use case:
%select-list__item {
&:hover {
background: red;
}
&:focus{
background: blue;
}
}
.select-list__item {
#extend %select-list__item;
&--selected,
&--selected:nth-child(2n),
&--selected:hover {
background: #00FF00;
}
}
Or here's another - bit of an OTT solution for the example but you get the idea:
%select-list__item {
&:hover {
background: red;
}
&:focus{
background: blue;
}
}
%selected-list__item {
background: #00FF00;
&:nth-child(2n),
&:hover {
background: #00FF00;
}
}
.select-list__item {
#extend %select-list__item;
&--selected {
#extend %selected-list__item
}
}

Bootstrap classes inside a defined class

Is there a way to put made classes inside a class?
e.g.
.my-upper-class{ .hidden-md, .hidden-sm, .hidden-lg}
Not with plain CSS, but with Sass, like so—
.hidden-sm {
background: red;
}
.hidden-md {
color: blue;
}
.hidden-lg {
font-size: 1em;
}
.my-upper-class {
#extend .hidden-sm;
#extend .hidden-md;
#extend .hidden-lg;
}
which outputs the final CSS as below, which is pretty much what you are looking for.
.hidden-sm, .my-upper-class {
background: red;
}
.hidden-md, .my-upper-class {
color: blue;
}
.hidden-lg, .my-upper-class {
font-size: 1em;
}

How to target the parent class from nested classes in SASS

Is there a way to achieve something like below in SASS without indicating .group-left twice?
.wrapper .group-left {
background-color: blue;
}
.wrapper-child:nth-child(2n+2) .group-left {
background: red;
}
I was trying to put ampersand after .group-left, but doesn't work. So, I have to re-select .group-left. Below is my current code.
.wrapper {
&:nth-child(2n+2) .group-left {
background-color: red;
}
.group-left {
background-color: blue;
}
}
Please advise. Thank you.
You could use parent selector and invert your nesting in sass
.group-left {
.wrapper & {
background-color: blue;
}
.wrapper-child:nth-child(2n+2) & {
background: red;
}
}
Try this.
.wrapper {
.group-left {
background-color: blue;
}
}
.wrapper-child {
&:nth-child(2n+2) {
.group-left {
background: red;
}
}
}

How to extend in scss from parent (in case of BEVM)

I try to understand BEVM+SCSS philosophy.
I don't know how to extend V from BE in this case.
What I want to achieve:
.block {
&__element {
background-color: black;
&--variation-a {
#extend &__element; //won't work
color: red;
}
&--variation-b {
#extend &__element; //won't work
color: green;
}
}
}
What I want to avoid:
.block {
&__element {
background-color: black;
&--variation-a {
#extend .block__element; //work but ugly
color: red;
}
&--variation-b {
#extend .block__element; //work but ugly
color: green;
}
}
}
The only way I've found it's to have a kind of %element { ... } aside and extends from it, but it's not exactly what I want.
You can use variables. $b to store block name and $e to store element name.
Sassmeister demo.
.block {
$b: &;
&__element {
$e: #{$b}__element;
background-color: black;
&--variation-a {
#extend #{$e};
color: red;
}
&--variation-b {
#extend #{$e};
color: green;
}
}
}
But it's bad practice to nest element styles by modifier. Modifier must only override styles.

its possible css selector inside another selector

sorry but it's confusing to me, somebody knows how it's possible or it's not possible..
#divp {
background-color: lightgrey;
.odiv {
background-color: yellow;
.pp { background-color: black; }
a { color:red; }
}
.pp { background-color: lightgreen; }
a { color:blue; }
}
#divw {
background-color: lightblue;
.odiv {
background-color: blue;
.pp { background-color: white; }
a { color:yellow; }
}
.pp { background-color: green; }
a { color:lightblue; }
}
i want create divs with internal css rules and i dont want to write all the time the same..... like
#diw .odiv .pp { background-color: white }
#diw .odiv .a { color: white }
#diw .odiv .other { color: blue }
is it possible?
Nesting selectors is not possible, but you might want to checkout CSS preprocessors, which will let you do this. http://lesscss.org/ for example.
It is not possible in standard CSS. But it is possible in Sass (and other CSS Preprocessors): http://sass-lang.com/guide#3
It works exactly as you posted in your question:
.div1{
background-color: red;
p{ font-size: 18px; }
}
Will output this:
.div1{ background-color: red }
.div1 p{ font-size: 18px; }
Check out http://sassmeister.com/ for a way to play around with Sass.

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