Can something like this be written using the :is() pseudo-class?
div p,
div p::before,
div p::after {
/* selectors */
}
I tried this but it didn't work:
div :is(p, p::before, p::after) {
/* selectors */
}
No you cannot.
Pseudo-elements cannot be represented by the matches-any pseudo-class; they are not valid within :is(). ref
Related
Can I add a class selector after a pseudo class in my CSS rule, e.g:
a:hover.my-class {
background: red;
}
So if I hover over my anchor tag, <a class="my-class">link</a>, will the background be red in all browsers? is this valid CSS?
Why I need this
I have this problem because it is generated from a mixin in SASS:
#mixin focus($classA, $classB) {
&:focus {
&#{$classA} {
background: blue;
}
&#{$classB} {
background: yellow;
}
}
}
a {
#include focus('.class-a', '.class-b')
}
There is no such thing as a "pseudo-selector".
There are two features in selectors that start with "pseudo-": pseudo-class and pseudo-element. They are completely different features with different syntax rules.
You can place a class selector after a pseudo-class such as :hover, because they are both simple selectors and order of simple selectors in a compound selector does not matter (type and universal selectors are the only exceptions to this rule — they always have to come first, such as the a in your example).
You cannot place a class selector after a pseudo-element such as ::before, because a pseudo-element is not a simple selector. Your question may not be about pseudo-elements, but this distinction has to be made because of the common use of the term "pseudo-selector", which incorrectly groups both features into a single umbrella term (and frankly makes the question more complicated than it really needs to be).
Yep, you can add a class to a pseudo class.
This css is valid and it works:
a:hover.hoverme {
background:blue;
color:white;
}
This works too:
a.hoverme:hover {
background:blue;
color:white;
}
Or you can add a pseudo class after a class.
.hoverme:hover {
background:blue;
color:white;
}
Hover me!
You can check if your CSS is valid at W3C's CSS Validator page.
The purpose of the question is to investigate the possibility of doings something like:
.element:before {
content: 'before';
color: orange;
}
.element:after {
content: 'after';
color: green;
}
.element:after:hover + .element:before {
color: red;
}
<div class='element'> </div>
Pseudo-elements cannot be targeted by sibling combinators because sibling combinators only represent element siblings, not pseudo-element siblings.
So, although the boxes generated by ::before and ::after are siblings of one another in terms of layout, for the purposes of sibling combinators they are not.
It is not possible to write a selector styling an element's ::before pseudo-element when its ::after pseudo-element is hovered. (For that matter, ::after:hover is not valid outside of Selectors 4 either, and no implementations exist.) There are hacks that make use of things like pointer-events but there is nothing that is guaranteed to work on all browsers.
I want to apply one CSS rule for multiple selectors. like this:
.btn-group.pull-right.with_space .btn + .btn, .btn-group.pull-right.with_space i + i{
margin-left: 10px;
}
Now my question is, if there's a shorter way to do it. (since the parent elements are the same for both selectors, and the different is only in the last child).
To expand on my comment, if you choose to use a CSS pre-processor such as SASS or LESS, you can do nested selectors, like so:
/* SASS example */
.btn-group.pull-right.with_space {
i + i, .btn + .btn {
/* ... */
}
}
After compiling, the resulting CSS will be similar to what you had already written.
Sometimes, it might be better to add a common class to the elements that are sharing styles. So, in your .btn + .btn and i + i elements, add a class, such as btn_and_i, so you can target them with a single selector:
/* CSS example */
.btn_and_i {
/* ... */
}
If you're hell-bent on making this the "shortest" selector possible, then add a single-character class to the targeted elements, such as "a".
.a {
/* ... */
}
I know it is strange, but how can I select all the IMGs in a document which don't have a source (I am talking about the CSS selector)
That is, I want to select
<IMG>
but not
<IMG src="/my_file.png">
The answer is
img:not([src]) {
/* style here */
}
You need to use :not selector
img:not([src]) {
/* style here */
}
Hello is there a way with css to style the 2nd element on page with the same class slightly differently to the first.
For example I have two ul's on a page with a class of topbardropdownmenu. I want to give the 2nd ul a differen't background to the first. Is there a way to do this with out altering the html?
You can do it with the :nth-child() pseudo-selector. It is CSS3 though, and not supported in some browsers (e.g. <=IE8 & <=FF3.0 doesnt support it).
.topbardropdownmenu:nth-child(2) { background: #FF0000; }
You could do it with JavaScript in a cross-browser compatible way though, if that's an option for you.
What holds the <ul> elements? I'll assume a <div id = "lists">
/* First element */
div > ul.topbardropdownmenu:first-child{
}
/* Rest of the elements */
div > ul.topbardropdownmenu{
}
...alternatively
div > ul.topbardropdownmenu:not(:first-child)
It depends which browsers your users are using, you might be able to use the nth-of-type css pseudo-selector:
ul.topbardropdownmenu:nth-of-type(2) {
/* styles the second ul of class=topbardropdownmenu
}
If there's a particular pattern to the occurrence of these ul elements, you could use descendant and/or sibling selectors:
div > ul.topbardropdownmenu {
/* styles all ul.topbardropdownmenu that are the immediate descendants of a div */
}
p + ul.topbardropdownmenu {
/* styles all ul.topbardropdownmenu that immediately follow a p */
}
Look at the CSS3 nth-child() pseudo-class.
You can use :nth-child http://css-tricks.com/how-nth-child-works/ but IE may struggle with it. Consider this jQuery alternative:
$(".class").eq(1).css();
http://api.jquery.com/eq/