I have two classes, one is used specifically fro certain tags, the other can be used on any tag:
a.action_link_2 {
display:inline-block;
}
.display_none {
display:none;
}
In some circumstances I want to apply both these styles and have tried this:
<a class="action_link display_none">content</a>
However, when rendered in the browser, the 'action_link' class take precedence. I understand that this might be to do with CSS class priority, i.e. tag-specific classes taking precedence. My question is how do I make this tag hidden using these classes and still allow the 'display_none' class to be used on any element to hide it?
you could just remove the a from before the class, and also add body before the display none class to give it a higher priority.
.action_link_2 {
display:inline-block;
}
body .display_none {
display:none;
}
You are right, it because specificity read this
To overcome the problem, you need to increase the specificity for
.display_none class when it is present on action_link_2 .
Just add one more rule, just below all of it
a.display_none {
display:none;
}
This will work , but there will be a problem when you try to add class
.display_none to an anchor, but there is no .action_link_2 class
present.
So the final and best solution would be to use:
.action_link_2.display_none {
display:none;
}
You could try this:
.display_none { display:none !important; }
Related
I have a class in my css called .btn:
.btn {
//stuff here
}
and I am going to create another class, lets say .btn2. I want to be able to inherit the characteristics from .btn into btn2, as I only want to change the color of button 2. Is there a way in CSS for this? Or should I just copy and paste the original stuff into the new class?
I'd suggest:
/* comma-separated selectors: */
.btn,
.btn2 {
/* shared properties */
}
.btn2 {
/* properties unique to btn2 */
}
JS Fiddle demo.
You can do it with dynamic stylesheets. Check out LESS or SASS.
EDIT:
Some additional info at a commenter's request. Here are the official sites. They both have examples on their home pages.
http://lesscss.org/
http://sass-lang.com/
What you can do is this
.btn, .btn2 {
/* Styles goes here */
}
This way, both the classes will share common properties defined in the rule block.
As far as the inheritance goes, something you would like to have..
.btn2 {
.btn; /* Won't work in pure CSS */
}
Won't work in pure CSS, you need to take a look at SASS or LESS
For a button I have 3 possible classes: "state-normal", "state-focus" and "state-hover".
All have the same attributes (background, border, ...), but different values for the
attributes.
If a button gets "state-focus", I do not want to remove the class "state-normal".
If a button is "state-focus" and gets "state-hover", I do not want to remove the class
"state-focus".
In the browser language specification you can give a "quality"/priority to a language:
"Accept-Language: da, en-gb;q=0.8, en;q=0.7"
It would be great to do the same also in css:
.state-normal { background-color: #aaaaaa;q=0.5 }
.state-focus { background-color: #bbbbbb;q=0.7 }
.state-hover { background-color: #eeeeee;q=0.9 }
I know that there is nothing in CSS.
But, I know in jQuery UI they have kind of this, because they don't remove "ui-state-default" when they assign "ui-state-focus" to an element. How do they do it?
Is there another way to implement this with a trick (WITHOUT !IMPORTANT).
Thanks alot in advance
You can do this using CSS.
.state-normal { background-color: #aaaaaa;q=0.5 }
.state-normal.state-focus { background-color: #bbbbbb;q=0.7 }
.state-focus.state-hover { background-color: #eeeeee;q=0.9 }
But this implies that all classes mentioned in the rule will be present, i.e. an element will have both classes present. So an element with class state-focus will not have the background-color set as per the rule.
If you want to avoid that, then you can do this instead:
.state-normal { background-color: #aaaaaa;q=0.5 }
.state-focus, .state-normal.state-focus { background-color: #bbbbbb;q=0.7 }
.state-hover, .state-focus.state-hover { background-color: #eeeeee;q=0.9 }
EDIT: As per OP's request
CSS Specificity
CSS Selectors - MDN
Similar answer
I have a very wierd question, I dont know wether if its possible in css or not
Suppose I have say 3 different css classes as shown below, as you can see I have a common property of all these classes, I want to declare this color somewhere else and pass a reference to it here, so if next time I want to change the color I can simply change at one place rather than changing in all the 5 classes.
I know that you can use body{}, or a wrapper for this but that would affect the colors of the entire site right ? Is there a way to do this ?
Is this even possible ?
.abc {
color:red;
}
.abc2 {
color:red;
}
.abc3 {
color:red;
}
.abc4 {
color:red;
}
.abc5 {
color:red;
}
The bad news: you can't do it in CSS.
The good news: you can write in a meta-CSS language like LESS, which then processes a LESS file to pure CSS. This is called a "mixin".
In LESS:
#errorColor: red;
.error-color {
color: #errorColor;
}
#error-1 {
.error-color;
}
.all-errors {
.error-color;
}
More info: http://lesscss.org/#-mixins
if you want to declare all of them at a time, you can use:
.abc, .abc2, .abc3, .abc4, .abc5 {
color:red;
}
Or you can declare an additional class & add to all the .abc, .abc2.... & make its color:red;.
This can not be done with CSS, but that is still a very popular thing to do by using a CSS preprocessor such as LESS, SASS, SCSS, or Stylus.
A preprocessor will let you define a variable (say $red = #F00). It will replace the variable in your CSS document with the variable value for you, allowing you to write very DRY and module CSS.
This functionality is referred to as "CSS variables", which is part of the future spec, but not yet implemented on any browsers.
For now, the best way to do this in pure CSS is to declare an additional class for the desired "global", and then add that class to all relevant items.
.abc_global { color: red; }
.abc1 { /* additional styling */ }
.abc2 { /* additional styling */ }
<div class="abc1 abc_global"></div>
<div class="abc2 abc_global"></div>
With LESS
You are able to define that red color once:
.myRedColor {
color:red;
}
Now you can call that red on any CSS styles. Even NESTED styles! It's a wicked tool!
.abc1 {
.myRedColor;
}
.abc2 {
.myRedColor;
}
.abc3 {
.myRedColor;
}
.abc4 {
.myRedColor;
}
NESTED EXAMPLE:
.abc {
.itsEasyAsOneTwoThree{
.myRedColor;
}
}
Now all of our "itsEasyAsOneTwoThree" classes that are properly nested inside of an "abc" class will be assigned the red style. No more remembering those long #867530 color codes :) How cool is that?!
You can also use PostCSS with the plugin postcss-preset-env and support custom properties/variables, then use the :root selector to add global css variables.
:root {
--color-gray: #333333;
--color-white: #ffffff;
--color-black: #000000;
}
I'm working on some CSS from a tutorial, a div has this class:
<div class="related products">
How can I reference it in the stylesheet?
The div actually has two classes, related and products. You can reference it in your stylesheet with either .related or .products, and it will pick up the styles from both of those rules. For example, with the following CSS, the text in the div in your question would appear red with font size 12:
.related { color:#ff0000 }
.products { font-size:12px }
If you want to select elements with both classes, use .related.products in your stylesheet. For example, add the following to the above example:
.related.products { font-weight:bold }
And the text in your div will receive all three rules, because it matches all 3 selectors. Here's a working example.
div.related.products is the general method
You reference it by div.related.products which literaly translates to "a div with class of related and class of products".
Or, you could reference it by using either class names, since it will catch both.
jsFiddle Example.
In the css, just put the name class of the div by doing this:
.related products {
/*styling to go here*/
}
Now any styling within the related products class will be applied to that div.
I'm wondering how can I apply a style to EVERY h2 that DOES have ANY any class attached to it, thus having the effect that the style will NOT be applied on a plain h2..eg..
<h2 class="1"></h2>
<h2 class="2"></h2>
<h2 class="3"></h2>
<h2 class="a"></h2>
<h2></h2>
All the ones with a class should have a style - and just plain h2 should not, (This is a huge site with hundreds of styles)...so any easy way to do this?
There is a method to do it but it's only possible with browsers that support CSS3 :not pseudo class.
h2[class] {
/* Styles for <h2> with a class, regardless of the value */
}
h2:not([class]) {
/* Styles for <h2> without classes */
}
I hope it works!
[Edit] I've made a simple demo for you here - http://jsfiddle.net/fL2sT/
What you're asking for is how CSS works by default.
The correct way to style elements which have no specific class assigned to them is to style the base element, as Ahsan demonstrated above. I don't know why he got downvoted.
h2 { property: value; }
Note that if H2 elements do have classes assigned to them, then that styling may override your base style.
So if you have: h2 { color:#333; font-size:2em; } as your base style, and then apply class="myClass" to it where: .class { color: #000; }, then the base style's color will be overriden (but not the font size). This is the cascade in Cascading Style Sheets.
Another way is to target them conditionally:
div#nav h2:first-child { property:value; }
which gives you contextual control, but again, class assignment will always override base styling, and may also override context targeting if the class application has higher specificity.
Why not simply use
h2[class] { ... }