Undo hover effect of parent when hovering over child [duplicate] - html

I know that there does not exist a CSS parent selector, but is it possible to style a parenting element when hovering a child element without such a selector?
To give an example: consider a delete button that when hovered will highlight the element that is about to become deleted:
<div>
<p>Lorem ipsum ...</p>
<button>Delete</button>
</div>
By means of pure CSS, how to change the background color of this section when the mouse is over the button?

I know it is an old question, but I just managed to do so without a pseudo child (but a pseudo wrapper).
If you set the parent to be with no pointer-events, and then a child div with pointer-events set to auto, it works:)
Note that <img> tag (for example) doesn't do the trick.
Also remember to set pointer-events to auto for other children which have their own event listener, or otherwise they will lose their click functionality.
div.parent {
pointer-events: none;
}
div.child {
pointer-events: auto;
}
div.parent:hover {
background: yellow;
}
<div class="parent">
parent - you can hover over here and it won't trigger
<div class="child">hover over the child instead!</div>
</div>
Edit:
As Shadow Wizard kindly noted: it's worth to mention this won't work for IE10 and below. (Old versions of FF and Chrome too, see here)

Well, this question is asked many times before, and the short typical answer is: It cannot be done by pure CSS. It's in the name: Cascading Style Sheets only supports styling in cascading direction, not up.
But in most circumstances where this effect is wished, like in the given example, there still is the possibility to use these cascading characteristics to reach the desired effect. Consider this pseudo markup:
<parent>
<sibling></sibling>
<child></child>
</parent>
The trick is to give the sibling the same size and position as the parent and to style the sibling instead of the parent. This will look like the parent is styled!
Now, how to style the sibling?
When the child is hovered, the parent is too, but the sibling is not. The same goes for the sibling. This concludes in three possible CSS selector paths for styling the sibling:
parent sibling { }
parent sibling:hover { }
parent:hover sibling { }
These different paths allow for some nice possibilities. For instance, unleashing this trick on the example in the question results in this fiddle:
div {position: relative}
div:hover {background: salmon}
div p:hover {background: white}
div p {padding-bottom: 26px}
div button {position: absolute; bottom: 0}
Obviously, in most cases this trick depends on the use of absolute positioning to give the sibling the same size as the parent, ánd still let the child appear within the parent.
Sometimes it is necessary to use a more qualified selector path in order to select a specific element, as shown in this fiddle which implements the trick multiple times in a tree menu. Quite nice really.

Another, simpler "alternate" approach (to an old question)..
would be to place elements as siblings and use:
Adjacent Sibling Selector (+)
or
General Sibling Selector (~)
<div id="parent">
<!-- control should come before the target... think "cascading" ! -->
<button id="control">Hover Me!</button>
<div id="target">I'm hovered too!</div>
</div>
#parent {
position: relative;
height: 100px;
}
/* Move button control to bottom. */
#control {
position: absolute;
bottom: 0;
}
#control:hover ~ #target {
background: red;
}
Demo Fiddle here.

there is no CSS selector for selecting a parent of a selected child.
you could do it with JavaScript

As mentioned previously "there is no CSS selector for selecting a parent of a selected child".
So you either:
use a CSS hack as described in NGLN's answer
use javascript - along with jQuery most likely
Here is the example for the javascript/jQuery solution
On the javascript side:
$('#my-id-selector-00').on('mouseover', function(){
$(this).parent().addClass('is-hover');
}).on('mouseout', function(){
$(this).parent().removeClass('is-hover');
})
And on the CSS side, you'd have something like this:
.is-hover {
background-color: red;
}

In 2022:
This can be now achieved with CSS only, using the :has pseudo-class and the following expression:
div:has(button:hover) {}
Here's a snippet showcasing the original proposition:
div:has(button:hover) {
background-color: cyan;
}
<div>
<p>Lorem ipsum ...</p>
<button>Delete</button>
</div>
See browser support here. At the time of writing, all major browser support it—except Firefox, which still has a flawed experimental implementation.

This solution depends fully on the design, but if you have a parent div that you want to change the background on when hovering a child you can try to mimic the parent with a ::after / ::before.
<div class="item">
design <span class="icon-cross">x</span>
</div>
CSS:
.item {
background: blue;
border-radius: 10px;
position: relative;
z-index: 1;
}
.item span.icon-cross:hover::after {
background: DodgerBlue;
border-radius: 10px;
display: block;
position: absolute;
z-index: -1;
top: 0;
left: 0;
right: 0;
bottom: 0;
content: "";
}
See a full fiddle example here

This is extremely easy to do in Sass! Don't delve into JavaScript for this. The & selector in sass does exactly this.
http://thesassway.com/intermediate/referencing-parent-selectors-using-ampersand

Related

How to exclusively style parent or child when hovering over either of them?

I have some very simple HTML that looks like
<div id="parent">
Child
</div>
I want to style the parent when hovering over the parent and I want to style the child when hovering over the child. I never want both to be styled at the same time.
I tried various combinations of :hover and :not() selectors in SCSS. Googling didn't bring me far; most solutions I found just tell me how to style the parent when hovering over the child, which is the opposite of what I want.
I found this and this workaround, both from 2013, but I was wondering whether there is a better, more modern way to do this.
If you only intend to support modern, evergreen browsers that support :has, then you can style #parent based on the following conditions:
is hovered
does not have a hovered child
That translates to a selector of such: #parent:hover:not(:has(#child:hover)).
In the example below, the #parent is red only when it is hovered and not its child:
#parent:hover:not(:has(#child:hover)) {
background: red;
}
#child:hover {
background: green;
}
<div id="parent">
Child
</div>

Override existing styles and move it to the child element's style

This is a follow-up question to - Override parent style if child element exists
As per suggestion and comments, :has is yet to be supported and there's no way to modify a parent's style if a certain child element exists.
Certainly not possible with just css alone.
I was thinking to pass down the z-index property to the child and unset it from the parent.
Here's what I've tried.
div#info {
z-index: unset !important;
}
div#info > div.label {
z-index: 109;
}
div#info > div.pop-up {
z-index: 110; /* Pop-up should always appear on top */
}
But still didn't work. Is this even possible?
The idea is: making the parent element have no style and z-index will be declared in the child elements.
NOTE: by just using CSS3, no scripts involved. HTML elements and style properties are generated by the API.
Finally got it working!
Given this HTML Structure:
<div id="info">
<div class="pop-up">...</div>
</div>
<div id="info">
<div class="label">...</div>
</div>
I just forced the parent to have no style properties and marked the z-index property for each child as !important
div#info {
z-index: unset !important;
}
div#info > div.label {
z-index: 109 !important;
}
div#info > div.pop-up {
z-index: 110 !important; /* Pop-up should always appear on top */
}
This works for my need. Not sure if it will be useful in general since a parent may have different styles that will be inherited by the child element.
Good thing I only have to worry just one property, the z-index.

How to apply CSS style only to div and not the before pseudo element

I have a html page which has a div looking like this:
<div class="get-this"> blah blah </div>
I have a before pseudoelement on the div and I am trying to apply CSS style only to the div which will not be applicable to the pseudo element.
.get-this:not(::before) {
padding-top:2px;
}
The style is applied to the entire div. IS it possible to restrict the style only to the div and not the pseudo element?
This is a straightforward use of the cascade.
The CSS cascade is intended to enable you to apply general styles to more general selectors and overriding styles to more specific selectors.
Hence:
.get-this {
padding-top:2px;
}
.get-this::before {
padding-top:0;
}
Working Example:
.paragraph-one {
color: red;
}
.paragraph-two {
color: blue;
}
.paragraph-one::before {
content: 'Paragraph One: ';
}
.paragraph-two::before {
content: 'Paragraph Two: ';
color: green;
}
<p class="paragraph-one">This is paragraph one. It is red.</p>
<p class="paragraph-two">This is paragraph two. It is blue.</p>
<p>The <code>::before</code> pseudo-element preceding Paragraph Two <em>isn't the same color</em> as the rest of Paragraph Two, because, further down the cascade, an overriding style has been declared for the more specific <code>.paragraph-two::before</code> selector.</p>
if you already applied all of your div element to have before or after css they would require you to type content: ""; in order to show style applied to DOM:before or DOM:after
Which means if you set content to none it won't show that.
to overwrite your div style you can simply do
.get-this:before {
content: none;
}
But I would avoid applying before or after properties to all of your div element of your application. div element is often used on many situation, therefore you will run into problem you are now facing on every div element. which mean writing css to overwrite css. that's just not a good practice in most of case.
Also if your DOM element that has before, after its position is related with parent DOM, that being said, if your DOM's padding, margin, positioning, size changes will effect to before or after of that DOM

CSS Only - make first element change colour when :hover over any sibling

I want solution using only CSS
we have 3 circle here.
Whenever I perform mouse-over on circles with class Name Mycircle , the circle with class Name BigCircle should change to red color
html
<div class="BigCircle"></div>
<div class="mycircle"></div>
<div class="mycircle"></div>
CSS
.mycircle,.BigCircle{width:50px; height:50px; border-radius:30px; background-color:grey; margin:3px}
.mycircle:hover{background:yellow}
.mycircle:hover .BigCircle{background:red}
Here is the demo >http://jsfiddle.net/JGbDs/4/
Thanks in Advance
In your comments you state that you cannot re-arrange the elements, but you can add ones if required.
For that reason the general sibling combintor in the accepted answer is not suitable as the .bigCircle element would have to come after all of the .myCircle elements.
There is no perfect way of achieving this using only CSS but it is possible by adding a "parent" element and using one of the following CSS solutions:
Solution 1
When hovering on the parent element, the .bigCircle child element will be coloured red:
Working example: http://jsfiddle.net/CKRef/
HTML
<div class="parent">
<div class="bigCircle"></div>
<div class="mycircle"></div>
<div class="mycircle"></div>
</div>
CSS
/* Add float to parent to fit width to content */
.parent {
float: left;
clear: both;
}
.parent:hover > .bigCircle{
background: red;
}
The issue with this solution is that the .bigCircle element will be coloured red when you hover anywhere on the parent, not just on .myCircle. Adding the float reduces this effect - but if you hover just outside of the circle then the .bigCircle will still be red.
Solution 2
Using the parent element as a relative container, we can add a new element to the page using the after pseudo selector when a .myCircle element is hovered over:
Working example http://jsfiddle.net/CKRef/1/
HTML
<div class="parent">
<div class="mycircle"></div>
<div class="mycircle"></div>
<div class="mycircle"></div>
</div>
CSS
/* replaced .bigCircle with mycircle:hover::after */
.mycircle, .mycircle:hover::after {
....
}
.parent {
position: relative;
}
.mycircle:hover::after {
content: "";
background-color: red;
position: absolute;
top: 0;
left: 0;
margin-top: 0;
}
The imperfection with this solution is that we are targeting the position of the first child of the parent element, rather than the element with the class name .bigCircle. Also, the after pseudo selector is not supported in IE7.
No. That's not possible using just css. "Any sibling" selector is not there in css.
However, if you can move BigCircle to end, you can use general sibling combinator which can select successor siblings.
.mycircle:hover ~ .BigCircle{background:red}

How to change one element while hovering over another

I have looked at several other questions but I can't seem to figure any of them out, so here is my problem: I would like to have a div or a span, when you hover over it an area would appear and would be like a drop down.
Such as I have an div, and I want to hover over it and have it show some info about the item I hovered over
<html>
<head>
<title>Question1</title>
<styles type="css/text">
#cheetah {
background-color: red;
color: yellow;
text-align: center;
}
a {
color: blue;
}
#hidden {
background-color: black;
}
a:hover > #hidden {
background-color: orange;
color: orange;
}
</styles>
</head>
<body>
<div id="cheetah">
<p>Cheetah</p>
</div>
<div id="hidden">
<p>A cheetah is a land mammal that can run up 2 60mph!!!</p>
</div>
</body>
</html>
But this ^ doesn't seem to work, I don't know why... and if there is a way to do that in CSS, I would like to know, but I want any and all suggestions.
You can achieve this in CSS only if the hidden div is a child of the element you use for hovering:
http://jsfiddle.net/LgKkU/
You cannot affect a non-child element using :hover from within CSS2, which is supported by all common browsers.
You can affect a sibling element using CSS2.1 selectors, like so:
a:hover + .sibling { ... }
However, this only works for direct siblings. This means you could have HTML like this:
<p>Cheetah <span class="sibling">Blah Blah Blah</span></p>
Notice that the a and the span are direct siblings.
Here's a fiddle showing the siblings working: http://jsfiddle.net/vUUxp/
However, not all browsers support the CSS2.1 sibling selectors, so you need to decide based on your target audience if you can use this or not.
Edit: Corrected my mistake on the CSS version for the + selector: it's 2.1 that defines it, not CSS3. I also added a link showing browser support. Otherwise, the answer is the same.
Or, if you're open to it, use jQuery.
Something like this would work:
$("#element") // select your element (supports CSS selectors)
.hover(function(){ // trigger the mouseover event
$("#otherElement") // select the element to show (can be anywhere)
.show(); // show the element
}, function(){ // trigger the mouseout event
$("#otherElement") // select the same element
.hide(); // hide it
});
And remember to wrap this in a DOM ready function ($(function(){...}); or $(document).ready(function(){...});).
You can absolutely do this in CSS3 now using the ~ adjacent sibling selector.
triggerSelector:hover ~ targetSelector {
display: block;
}
For example, if you want a tooltip to appear when hovering over an adjacent button:
.button:hover ~ .tooltip {
display: block;
}