How to override the width and height values in scss file - css

I want to override the default values in scss file like
.auth-form {
width: 800px;
}
I change the width values in class auth-form scss file. But it is not working.
How to override the values in scss file. Please let me know.

Making assumptions on what will be the case you are probably facing a scope issue. If you have the following css:
.foo .bar {
color: red;
}
.bar {
color: blue;
}
.bar will always be red, because you are not overwriting the selector in the correct scope.
So in your case you need to specify the full selector:
.full.scope .auth-form {
width: 800px;
}
Where .full.scope is the full selector to .auth-form. You can get the full selector using on the css you eqnt to overwrite using the browser inspector.
Another option will be to make the property prioritary using the !important css keyword so it will overwrite any previous definition:
.auth-form {
width: 800px !important;
}
Hope it helps.

.scss (sass) files are not directly loadable into browsers, they need to be compiled to .css files first, then those are loaded into browsers by your application.
It seems you are not performing the compilation step (also called preprocessing or precompiling) and this is the reason you do not see the modification in your app.
How the compilation should be done varies. You may use sass directly (see here) or if you are using a framework there may be tools that combine this and other automation steps. For instance in Ruby-on-Rails you would install the required compile tool in the form of a gem and run:
bundle exec rake assets:precompile
As you do not provide details on your environment / framework is is difficult to provide the exact procedure applicable to you.

Related

Ignore style declaration without value is SCSS

In my scss file I am importing a third-party css file
#import 'icons/third-party-icons/style';
Unfortunately, this style is missing the value for the color style
.mySelector {
content: "\eac2";
margin-left: -1em;
color: ;
}
As expected, node-sass is throwing the following error:
ModuleBuildError: Module build failed (from
./node_modules/sass-loader/lib/loader.js):
color: ;
^
Style declaration must contain a value
Is there any way to configure node-sass to ignore this invalid property?
In my opinion, that error report is there for a reason, you shouldn't have empty definitions as that is technically an error. In unminified CSS you wouldn't have an issue it would just appear as strikethrough in the element inspector in the browser, but in this case you break the minify process.
Instead of importing it you can download the CSS code if possible and save it in your project locally then solve the issues manually. It won't matter what you do later in your CSS file, the error will appear. Or else you can try to link the CSS in the header. If you are using PHP or similar serverside scripting then create a separate header.php (for example) and include it into every file. This way you will need to copy and paste the link once and you can access the style at every page.
You could override the imported css. The code is looking to use a value, but can't because it's null.
You could include in your style tags:
.mySelector {
color: black !important;
}
That !important will override whatever is imported from the stylesheet, and you class in the body will use that color instead of trying to use the null color.

Import file into nested selector

Is there a postcss solution for importing a file into / nesting inside a selector? I can't get postcss-import or postcss-nested to do what I'm after.
.some-selector {
#import 'some.css';
}
Given a file e.g. import-me.css containing
div {
color: red;
}
I'd like to process entry.css
.some-class {
#import 'import-me.css';
}
And see the output
.some-class div {
color: red;
}
Thanks!
UPDATE: for the trivial example, you can bodge it by using postcss-nested-import AND postcss-nested but this has a couple of drawbacks because (a) postcss-nested-import paths are relative to the script running it, whereas css convention is that imports should be relative to the calling file (b) the maintainer has abandoned it https://github.com/eriklharper/postcss-nested-import/issues/2 <--- this issue in turn references https://github.com/postcss/postcss-import/issues/214 which is a dead thread :-(
postcss-partial-import seems to do the trick.
https://github.com/jonathantneal/postcss-partial-import

How to import specified classes from CSS file instead of everything

I'm trying to import some classes from a CSS file like bootstrap.css to my site.scss SASS file, not all of them. The problem with following code is that I get all bootstrap classes in my compiled site.css file:
site.scss
#import "bootstrap";
.my-div-md-6
{
/*some other styles*/
#extend .col-md-6;
}
On the other hand, It is possible to do this with LESS by importing bootstrap.css as reference using this code:
site.less
#import (less, reference) "bootstrap.css";
.my-div-md-6{
/*some other styles*/
&:extend(.col-md-6);
}
The compiled output of LESS is very light as below:
site.css
.my-div-md-6 {
position: relative;
min-height: 1px;
padding-right: 15px;
padding-left: 15px;
}
#media (min-width: 992px) {
.my-div-md-6 {
float: left;
}
.my-div-md-6 {
width: 50%;
}
}
.my-div-md-6 {
/*some other styles*/
}
Is it possible to achieve this with SASS? If yes, giving a quick example would help.
Unfortunately, there is not simple answer and at the time of writing this, Ruby Sass does not natively support the LESS import (reference) feature.
TLDR; Suggestions:
use uncss or postcss to remove the compiled css from file before finalising stylesheet.
if you can, use mixins and placeholder classes as a rewrite of the scss file, but this is the MOST time consuming.
import "file" as partial such that file="_file.scss" and #extend .class if you absolutely have to, (manual method but suppose it'll work)
UNCSS
You can use uncss as a package from npm to remove the compiled css (I know this isn't efficient, but if you had to use SASS), then you'd remove the chaff that's generated from the example bootstrap import.
HOW?
QUOTE: SO-Answer-Joesph
How? The process by which UnCSS removes the unused rules is as follows:
The HTML files are loaded by PhantomJS and JavaScript is executed.
Used stylesheets are extracted from the resulting HTML.
The stylesheets are concatenated and the rules are parsed by css-parse.
document.querySelector filters out selectors that are not found in the HTML files.
The remaining rules are converted back to CSS.
So yes, it removes selectors not in the DOM at runtime. If you have dynamically added selectors, you can make uncss ignore them by commenting: /* uncss:ignore */ before them, e.g...
MAKE SURE YOU ADD THE MEDIA OPTION IN UNCSS
REF: SO-Answer-Deksden
SASS Background research:
Summarising above:
nex3: one of the core leads for sass, has been at google and working on dart. They released dart-sass (unstable release) as a rewrite in favour to replace and improve upon ruby sass. This is interesting as this rewrite also explains the lack of feature development in Ruby Sass as well as the need for a rewrite. Since a core contributor of a ruby sass port: i.e. libsass (C++ implementation of ruby-sass) left the libsass team, it brings a further impetus to improve on sass performance.
Credit:
Joesph
Deksden

Inheritance CSS properties

We are using a framework that allow us to modify the color scheme use throughout the application. I cannot play a lot with the color and would like to reuse them in some classes. So let say that the framework define this class
.StyleFromFramework {
color:#515151;
background-color: #FFFFFF;
}
is located in a css file that I can't modify cause this file is handled by the framework (if I modified this file, all my modification will be lost when the new version of the framework is installed)
I would like to reuse the color of this classes in another class in a file containing all my updates.
.NewStyle {
color: **.StyleFromFramework:color**
Font: Verdan 11 px;
}
Is there a way to do that ?
I would try the following.
.StyleFromFramework, .NewStyle {
color:#515151;
}
.StyleFromFramework {
background-color: #FFFFFF;
}
.NewStyle {
background-color: none; /* or some other value... */
}
The first rule shares the color, and the the other two rules specify properties that are specific to the two other classes.
You should take a look at less.css which does exactly what you're looking for.
perhaps I didn't understand you correctly, but CSS is not dynamic language in which you can reuse rules and components.
I would recommend to use SASS/SCSS framework or something similar (LESS, Stylus... etc.)
In those frameworks, This is one of the most useful features, lets you share a set of CSS properties from one selector to another
read more here: http://sass-lang.com
Using a CSS preprocessor like Sass, Less or Stylus allows the use of variables which then can be reused in your project.
Foundation for instance can be completely restyled with Sass.

create different css files from same less files

I was wondering if anyone had found a way to create different CSS files from the same less files.
In my context I created a different customer less file. This file consist in a series of variable with their settings for the theme of a specific color and other CSS instruction.
I also have a less file for the default settings.
Here a representation of the less folder
Less Folder
My less folder
All the style specific to my context
customer.default.less
cutomer.less
I would like to compile two different css from the "My less folder" the first one would use the customer.default.less file in the variables. The second one would use the customer.less file. Creating the customer.default.css and the customer.css. In order of having the customer.css and the customer.default.css all way in synch together.
I'm currently using the compiler plugin in webstorm. Am I using the right tool?
Thanks
You can indeed produce multiple CSS outputs from a Less file, provided you use 'control' Less files.
E.g., here is the main stylesheet we're using for a site:
/* main-stylesheet.less */
#maincolor: #ff0000;
#secondarycolor: #00ff00;
body {
color: #maincolor;
background-color: #secondarycolor;
}
Now, we want to produce a secondary stylesheet (to output 'customer.default.css', or 'customer.css' as you prefer) - we import the main Less and override its variables:
/* secondary-stylesheet.less */
#import "main-stylesheet";
// Override variables from the 'main' stylesheet.
#maincolor: #0000ff;
Note that we do not define any rules or set any styles here, only override the variables.
Here are the output CSS files:
/* main */
body {
color: #ff0000;
background-color: #00ff00;
}
/* secondary */
body {
color: #0000ff;
background-color: #00ff00;
}
This is possible because Less uses lazy loading.
Be sure that the file watcher setting 'Track only root files' is disabled; otherwise the main stylesheet in our example would not produce any output css.
(Also, I would separate the two variable declaration blocks into their own Less files - perhaps as theme-variables-default.less and theme-variables-override-a.less)
I think you can accomplish this using the grunt-contrib-less GruntJS task with something like this in your Gruntfile.
less: {
development: {
files: {
"path/to/customer.css": "path/to/customer.less"
"path/to/customer.default.css": "path/to/customer.default.less"
}
},
production: {
files: {
"path/to/customer.css": "path/to/customer.less"
"path/to/customer.default.css": "path/to/customer.default.less"
}
}
}
LESS isn't my bread-and-butter, but using Sass enough and the grunt-contrib-sass task I assume the same set of features would exist.

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