I'm trying to create a dynamic solution for colors in SCSS
The idea is use an attribute value in markup as property value in SCSS.
The example of the idea:
<p text-color="#00ff6e"> Sample </p>
And in SCSS
[text-color="$color"] {
color: $color !important;
}
Is this even possible ? Do you ever try to build something like this ?
Thanks for the help!
you don't even need SCSS - do it with CSS custom properties!
p {
color: var(--text-color) !important;
}
<p style="
--text-color: #00ff6e;
"> Sample </p>
note that even though custom properties have wide support in evergreen browsers, internet explorer's support is entirely lacking at the moment (edge has full support starting version 16).
you may be tempted to attempt the attr() function, but it'll fail in this case; its value is always treated as a CSS string.
furthermore, according to MDN, it only has strong support within the content property, and while the attribute-name parameter has consistent behavior, support for <type-or-unit> is sparse.
I'd never have a reason to do this, especially if I can add a reusable class that sets:
.text-color {
color: $color;
}
Related
It is possible to pass parameters for CSS in class name? For example:
.mrg-t-X {
margin-top: Xpx;
}
<span class="mrg-t-10">Test</span>
In this example X should be 10.
No it isn't. The closest we have to this is the attr() function, but that only works within the content property:
figure::before {
content: attr(data-before) ', ';
}
figure::after {
content: attr(data-after) '!';
}
<figure data-before="Hello" data-after="world"></figure>
Perhaps one day this will be expanded so that we can use it elsewhere, but for now this isn't possible.
Currently as I'm sure you're aware if you want to be able to use the .mrg-t-X class, you'll need to define separate style rules for each X you wish to allow:
.mrg-t-1 { ... }
.mrg-t-2 { ... }
.mrg-t-3 { ... }
...
Nowdays you can use CSS variable inside a style attribute instead generating a specific class:
Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that contain specific values to be reused throughout a document. They are set using custom property notation (e.g., --main-color: black;) and are accessed using the var() function (e.g., color: var(--main-color);).
Complex websites have very large amounts of CSS, often with a lot of repeated values. For example, the same color might be used in hundreds of different places, requiring global search and replace if that color needs to change. Custom properties allow a value to be stored in one place, then referenced in multiple other places. An additional benefit is semantic identifiers. For example, --main-text-color is easier to understand than #00ff00, especially if this same color is also used in other contexts.
Custom properties are subject to the cascade and inherit their value from their parent.
example
span {
display: block;
margin-top: var(--m-t);
}
html {
background: repeating-linear-gradient(to bottom, transparent, 10px, lightgrey 10px, lightgrey 20px);} /* see 10px steps */
<span style="--m-t:50px">one</span>
<span style="--m-t:85px">two</span>
<span style="--m-t:110px;">three</span>
Maybe you are looking for SCSS or LESS. It have mixins, variables, etc, and it autocompile real and long css. It was maded to this purposes and write less and less css with the same result.
http://sass-lang.com/guide
http://lesscss.org/
#size: 10px;
.class { font-size: #size; }
Good luck!
It isn't possible to directly pass parameters using just CSS but you're not the first person to ask - check out this question which looks at CSS and JavaScript options and also this might be helpful regarding attribute selection.
This will only help if you are looking at a few variables of margin-top but I don't know what context you're using this in. Depending on what you're using it for there might be better ways.
The simplest way would probably be just to add the style inline to your span <span style="margin-top:10px"> but I try to stay away from inline CSS!
no your code is wrong
but you can write css inside the tag
*<span style="margin-top:Xpx;">*
It is possible to pass parameters for CSS in class name? For example:
.mrg-t-X {
margin-top: Xpx;
}
<span class="mrg-t-10">Test</span>
In this example X should be 10.
No it isn't. The closest we have to this is the attr() function, but that only works within the content property:
figure::before {
content: attr(data-before) ', ';
}
figure::after {
content: attr(data-after) '!';
}
<figure data-before="Hello" data-after="world"></figure>
Perhaps one day this will be expanded so that we can use it elsewhere, but for now this isn't possible.
Currently as I'm sure you're aware if you want to be able to use the .mrg-t-X class, you'll need to define separate style rules for each X you wish to allow:
.mrg-t-1 { ... }
.mrg-t-2 { ... }
.mrg-t-3 { ... }
...
Nowdays you can use CSS variable inside a style attribute instead generating a specific class:
Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that contain specific values to be reused throughout a document. They are set using custom property notation (e.g., --main-color: black;) and are accessed using the var() function (e.g., color: var(--main-color);).
Complex websites have very large amounts of CSS, often with a lot of repeated values. For example, the same color might be used in hundreds of different places, requiring global search and replace if that color needs to change. Custom properties allow a value to be stored in one place, then referenced in multiple other places. An additional benefit is semantic identifiers. For example, --main-text-color is easier to understand than #00ff00, especially if this same color is also used in other contexts.
Custom properties are subject to the cascade and inherit their value from their parent.
example
span {
display: block;
margin-top: var(--m-t);
}
html {
background: repeating-linear-gradient(to bottom, transparent, 10px, lightgrey 10px, lightgrey 20px);} /* see 10px steps */
<span style="--m-t:50px">one</span>
<span style="--m-t:85px">two</span>
<span style="--m-t:110px;">three</span>
Maybe you are looking for SCSS or LESS. It have mixins, variables, etc, and it autocompile real and long css. It was maded to this purposes and write less and less css with the same result.
http://sass-lang.com/guide
http://lesscss.org/
#size: 10px;
.class { font-size: #size; }
Good luck!
It isn't possible to directly pass parameters using just CSS but you're not the first person to ask - check out this question which looks at CSS and JavaScript options and also this might be helpful regarding attribute selection.
This will only help if you are looking at a few variables of margin-top but I don't know what context you're using this in. Depending on what you're using it for there might be better ways.
The simplest way would probably be just to add the style inline to your span <span style="margin-top:10px"> but I try to stay away from inline CSS!
no your code is wrong
but you can write css inside the tag
*<span style="margin-top:Xpx;">*
It is possible to pass parameters for CSS in class name? For example:
.mrg-t-X {
margin-top: Xpx;
}
<span class="mrg-t-10">Test</span>
In this example X should be 10.
No it isn't. The closest we have to this is the attr() function, but that only works within the content property:
figure::before {
content: attr(data-before) ', ';
}
figure::after {
content: attr(data-after) '!';
}
<figure data-before="Hello" data-after="world"></figure>
Perhaps one day this will be expanded so that we can use it elsewhere, but for now this isn't possible.
Currently as I'm sure you're aware if you want to be able to use the .mrg-t-X class, you'll need to define separate style rules for each X you wish to allow:
.mrg-t-1 { ... }
.mrg-t-2 { ... }
.mrg-t-3 { ... }
...
Nowdays you can use CSS variable inside a style attribute instead generating a specific class:
Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that contain specific values to be reused throughout a document. They are set using custom property notation (e.g., --main-color: black;) and are accessed using the var() function (e.g., color: var(--main-color);).
Complex websites have very large amounts of CSS, often with a lot of repeated values. For example, the same color might be used in hundreds of different places, requiring global search and replace if that color needs to change. Custom properties allow a value to be stored in one place, then referenced in multiple other places. An additional benefit is semantic identifiers. For example, --main-text-color is easier to understand than #00ff00, especially if this same color is also used in other contexts.
Custom properties are subject to the cascade and inherit their value from their parent.
example
span {
display: block;
margin-top: var(--m-t);
}
html {
background: repeating-linear-gradient(to bottom, transparent, 10px, lightgrey 10px, lightgrey 20px);} /* see 10px steps */
<span style="--m-t:50px">one</span>
<span style="--m-t:85px">two</span>
<span style="--m-t:110px;">three</span>
Maybe you are looking for SCSS or LESS. It have mixins, variables, etc, and it autocompile real and long css. It was maded to this purposes and write less and less css with the same result.
http://sass-lang.com/guide
http://lesscss.org/
#size: 10px;
.class { font-size: #size; }
Good luck!
It isn't possible to directly pass parameters using just CSS but you're not the first person to ask - check out this question which looks at CSS and JavaScript options and also this might be helpful regarding attribute selection.
This will only help if you are looking at a few variables of margin-top but I don't know what context you're using this in. Depending on what you're using it for there might be better ways.
The simplest way would probably be just to add the style inline to your span <span style="margin-top:10px"> but I try to stay away from inline CSS!
no your code is wrong
but you can write css inside the tag
*<span style="margin-top:Xpx;">*
It is possible to pass parameters for CSS in class name? For example:
.mrg-t-X {
margin-top: Xpx;
}
<span class="mrg-t-10">Test</span>
In this example X should be 10.
No it isn't. The closest we have to this is the attr() function, but that only works within the content property:
figure::before {
content: attr(data-before) ', ';
}
figure::after {
content: attr(data-after) '!';
}
<figure data-before="Hello" data-after="world"></figure>
Perhaps one day this will be expanded so that we can use it elsewhere, but for now this isn't possible.
Currently as I'm sure you're aware if you want to be able to use the .mrg-t-X class, you'll need to define separate style rules for each X you wish to allow:
.mrg-t-1 { ... }
.mrg-t-2 { ... }
.mrg-t-3 { ... }
...
Nowdays you can use CSS variable inside a style attribute instead generating a specific class:
Custom properties (sometimes referred to as CSS variables or cascading variables) are entities defined by CSS authors that contain specific values to be reused throughout a document. They are set using custom property notation (e.g., --main-color: black;) and are accessed using the var() function (e.g., color: var(--main-color);).
Complex websites have very large amounts of CSS, often with a lot of repeated values. For example, the same color might be used in hundreds of different places, requiring global search and replace if that color needs to change. Custom properties allow a value to be stored in one place, then referenced in multiple other places. An additional benefit is semantic identifiers. For example, --main-text-color is easier to understand than #00ff00, especially if this same color is also used in other contexts.
Custom properties are subject to the cascade and inherit their value from their parent.
example
span {
display: block;
margin-top: var(--m-t);
}
html {
background: repeating-linear-gradient(to bottom, transparent, 10px, lightgrey 10px, lightgrey 20px);} /* see 10px steps */
<span style="--m-t:50px">one</span>
<span style="--m-t:85px">two</span>
<span style="--m-t:110px;">three</span>
Maybe you are looking for SCSS or LESS. It have mixins, variables, etc, and it autocompile real and long css. It was maded to this purposes and write less and less css with the same result.
http://sass-lang.com/guide
http://lesscss.org/
#size: 10px;
.class { font-size: #size; }
Good luck!
It isn't possible to directly pass parameters using just CSS but you're not the first person to ask - check out this question which looks at CSS and JavaScript options and also this might be helpful regarding attribute selection.
This will only help if you are looking at a few variables of margin-top but I don't know what context you're using this in. Depending on what you're using it for there might be better ways.
The simplest way would probably be just to add the style inline to your span <span style="margin-top:10px"> but I try to stay away from inline CSS!
no your code is wrong
but you can write css inside the tag
*<span style="margin-top:Xpx;">*
Is there/what is the best way to set a variable in my CSS stylesheet that is cross browser compatible?
I want to set
color: #123456;
into a variable since I am using it in numerous different spots and if I choose to change that colour I want it all the change.
CSS Variables are a thing but the only browser that has any support for it at this time is Mozilla.
Alternative options:
use Javascript and/or a server-side language to set the variables in your CSS file programatically.
use a CSS preprocessor like SASS. This allows you to create variables. You do have to re-deploy your CSS each time.
consider handling colors a different way in your markup.
Regarding the last one, instead of hardcoding a color into an elements style:
<div class="thisElement"></div>
.thisElement {
font-size: 13px
background: red;
color: #123456;
}
consider using classes for this instea:
<div class="thisElement color1"></div>
.thisElement {
font-size: 13px
background: red;
}
.color1 {
color: #123456;
}
That way you only need to declare the color once in your style sheet. This is essentially 'object oriented CSS'. The idea is that instead of applying monolithic style declarations for each DOM object, you instead declare 'snippets' of style to a bunch of separate classes, then assign those separate classes as you see fit to each DOM object.
In a sense, you've turned the class name, itself, into the variable. You declare it in your CSS once, then use it as many times as needed in your HTML.
If you want to do it in native css you can't. However, you can use technologies / preprocessors like SASS / LESS to achieve exactly what you are describing.
Cross-browser compatibility, variables and calculating.
Once you get used to the syntax (which is really easy to understand and modify) and you are ready to go, SASS creates the "plain" css files for you. Keeps your code clean, simple and easy to maintain.
Have a look at this:
http://sass-lang.com/
Also, here you can find some examples and snippets to have a first impression.
Its not well supported, but this is how it works according to
http://www.w3.org/TR/css-variables/
Custom properties define variables, referenced with the var() notation, which can be used for many purposes. For example, a page that consistently uses a small set of colors in its design can store the colors in custom properties and use them with variables:
:root {
--main-color: #06c;
--accent-color: #006;
}
/* The rest of the CSS file */
#foo h1 {
color: var(--main-color);
}
You can to use a preprocessor like SASS, which has this done much better.