How to change sprite image when focus input form? [duplicate] - javascript

The plus sign selector (+) is for selecting the next adjacent sibling.
Is there an equivalent for the previous sibling?

No, there is no "previous sibling" selector.
On a related note, ~ is for general successor sibling (meaning the element comes after this one, but not necessarily immediately after) and is a CSS3 selector. + is for next sibling and is CSS2.1.
See Adjacent sibling combinator from Selectors Level 3 and 5.7 Adjacent sibling selectors from Cascading Style Sheets Level 2 Revision 1 (CSS 2.1) Specification.

I found a way to style all previous siblings (opposite of ~) that may work depending on what you need.
Let's say you have a list of links and when hovering on one, all the previous ones should turn red. You can do it like this:
/* default link color is blue */
.parent a {
color: blue;
}
/* prev siblings should be red */
.parent:hover a {
color: red;
}
.parent a:hover,
.parent a:hover ~ a {
color: blue;
}
<div class="parent">
link
link
link
link
link
</div>

Selectors level 4 proposes :has() (previously the subject indicator !) which will, one day, allow you to select a previous sibling with:
previous:has(+ next) {}
or (for a general previous sibling rather than adjacent one):
previous:has(~ next) {}
At the time of writing :has{} is supported by most but not all major browsers. Support is improving.
Over the years this answer has attracted dozens of "It's still not supported" comments (now deleted). Please don't add any more. There's a link to an regularly updated browser support chart in the answer.

Consider the order property of flex and grid layouts.
I'll focus on flexbox in the examples below, but the same concepts apply to Grid.
With flexbox, a previous sibling selector can be simulated.
In particular, the flex order property can move elements around the screen.
Here's an example:
You want element A to turn red when element B is hovered.
<ul>
<li>A</li>
<li>B</li>
</ul>
STEPS
Make the ul a flex container.
ul { display: flex; }
Reverse the order of siblings in the mark-up.
<ul>
<li>B</li>
<li>A</li>
</ul>
Use a sibling selector to target Element A (~ or + will do) .
li:hover + li { background-color: red; }
Use the flex order property to restore the order of siblings on the visual display.
li:last-child { order: -1; }
...and voilà! A previous sibling selector is born (or at least simulated).
Here's the full code:
ul {
display: flex;
}
li:hover + li {
background-color: red;
}
li:last-child {
order: -1;
}
/* non-essential decorative styles */
li {
height: 200px;
width: 200px;
background-color: aqua;
margin: 5px;
list-style-type: none;
cursor: pointer;
}
<ul>
<li>B</li>
<li>A</li>
</ul>
From the flexbox spec:
5.4. Display Order: the order property
Flex items are, by default, displayed and laid out in the same order as they appear in the source document. The
order property can be used to change this ordering.
The order property controls the order in which flex items appear within the flex container, by assigning them to ordinal groups. It takes a single <integer> value, which specifies which ordinal group the flex item
belongs to.
The initial order value for all flex items is 0.
Also see order in the CSS Grid Layout spec.
Examples of "previous sibling selectors" created with the flex order property.
.container { display: flex; }
.box5 { order: 1; }
.box5:hover + .box4 { background-color: orangered; font-size: 1.5em; }
.box6 { order: -4; }
.box7 { order: -3; }
.box8 { order: -2; }
.box9 { order: -1; }
.box9:hover ~ :not(.box12):nth-child(-1n+5) { background-color: orangered;
font-size: 1.5em; }
.box12 { order: 2; }
.box12:hover ~ :nth-last-child(-1n+2) { background-color: orangered;
font-size: 1.5em; }
.box21 { order: 1; }
.box21:hover ~ .box { background-color: orangered; font-size: 1.5em; }
/* non-essential decorative styles */
.container {
padding: 5px;
background-color: #888;
}
.box {
height: 50px;
width: 75px;
margin: 5px;
background-color: lightgreen;
display: flex;
justify-content: center;
align-items: center;
text-align: center;
cursor: pointer;
}
<p>
Using the flex <code>order</code> property to construct a previous sibling selector
</p>
<div class="container">
<div class="box box1"><span>1</span></div>
<div class="box box2"><span>2</span></div>
<div class="box box3"><span>3</span></div>
<div class="box box5"><span>HOVER ME</span></div>
<div class="box box4"><span>4</span></div>
</div>
<br>
<div class="container">
<div class="box box9"><span>HOVER ME</span></div>
<div class="box box12"><span>HOVER ME</span></div>
<div class="box box6"><span>6</span></div>
<div class="box box7"><span>7</span></div>
<div class="box box8"><span>8</span></div>
<div class="box box10"><span>10</span></div>
<div class="box box11"><span>11</span></div>
</div>
<br>
<div class="container">
<div class="box box21"><span>HOVER ME</span></div>
<div class="box box13"><span>13</span></div>
<div class="box box14"><span>14</span></div>
<div class="box box15"><span>15</span></div>
<div class="box box16"><span>16</span></div>
<div class="box box17"><span>17</span></div>
<div class="box box18"><span>18</span></div>
<div class="box box19"><span>19</span></div>
<div class="box box20"><span>20</span></div>
</div>
jsFiddle
A Side Note – Two Outdated Beliefs about CSS
Flexbox is shattering long-held beliefs about CSS.
One such belief is that a previous sibling selector is not possible in CSS.
To say this belief is widespread would be an understatement. Here's a sampling of related questions on Stack Overflow alone:
Select the preceding sibling of an element in CSS using selectors
CSS: select previous sibling
CSS select previous sibling
Previous adjacent selector in CSS
Select previous siblings on hover
CSS selector to get preceding sibling
Change color of sibling elements on hover using CSS
How to select the previous sibling using selenium css syntax
CSS Selector for selecting an element that comes BEFORE another element?
How to add styling to active input's previous sibling using CSS only
CSS selector for next and previous elements
How to affect other elements when a div is hovered
As described above, this belief is not entirely true. A previous sibling selector can be simulated in CSS using the flex order property.
The z-index Myth
Another long-standing belief has been that z-index works only on positioned elements.
In fact, the most current version of the spec – the W3C Editor's Draft – still asserts this to be true:
9.9.1 Specifying the stack level: the z-index
property
z-index
Value: auto | | inherit
Initial: auto
Applies to: positioned elements
Inherited: no
Percentages: N/A
Media: visual
Computed value: as specified
(emphasis added)
In reality, however, this information is obsolete and inaccurate.
Elements that are flex items or grid items can create stacking contexts even when position is static.
4.3. Flex Item Z-Ordering
Flex items paint exactly the same as inline blocks, except that order-modified document order is used in place of raw
document order, and z-index values other than auto create a stacking context even if position is static.
5.4. Z-axis Ordering: the z-index property
The painting order of grid items is exactly the same as inline blocks, except that order-modified document order is
used in place of raw document order, and z-index values other than auto create a stacking context even if
position is static.
Here's a demonstration of z-index working on non-positioned flex items: https://jsfiddle.net/m0wddwxs/

I had the same question, but then I had a "duh" moment. Instead of writing
x ~ y
write
y ~ x
Obviously this matches "x" instead of "y", but it answers the "is there a match?" question, and simple DOM traversal may get you to the right element more efficiently than looping in javascript.
I realize that the original question was a CSS question so this answer is probably completely irrelevant, but other Javascript users may stumble on the question via search like I did.

There's not "previous selector", but you can use the combination of :not and ~ ("after selector"). No reverse order, no javascript.
.parent a{
color: blue
}
.parent a.active{
color: red
}
.parent a:not(.parent a.active ~ a){
color: red
}
<div class="parent">
link
link
link
link
link
</div>
I think my approach is more straight-forward than "style all divs, than remove styling for after divs", or using javascript, or using reverse order.

Three tricks:
basically, reversing the HTML order of your elements in HTML,
and using the ~ Next siblings operator:
1. Using CSS Flex and row-reverse
.reverse {
display: inline-flex;
flex-direction: row-reverse;
}
.reverse span:hover ~ span { /* On SPAN hover target its "previous" elements */
background:gold;
}
Hover a SPAN and see the previous elements being styled!<br>
<div class="reverse">
<!-- Reverse the order of inner elements -->
<span>5</span>
<span>4</span>
<span>3</span>
<span>2</span>
<span>1</span>
</div>
2. Using Flex with direction: RTL
.reverse {
display: inline-flex;
direction: rtl;
}
.reverse span:hover ~ span { /* On SPAN hover target its "previous" elements */
background: red;
}
Hover a SPAN and see the previous elements being styled!<br>
<div class="reverse">
<!-- Reverse the order of inner elements -->
<span>5</span>
<span>4</span>
<span>3</span>
<span>2</span>
<span>1</span>
</div>
3. Using float right
.reverse {
display: inline-block;
}
.reverse span{
float: right;
}
.reverse span:hover ~ span { /* On SPAN hover target its "previous" elements */
background: red;
}
Hover a SPAN and see the previous elements being styled!<br>
<div class="reverse">
<!-- Reverse the order of inner elements -->
<span>5</span>
<span>4</span>
<span>3</span>
<span>2</span>
<span>1</span>
</div>

+ is for the next sibling. Is there an equivalent for the previous
sibling?
You can use the two axe selectors: ! and ?
There are 2 subsequent sibling selectors in conventional CSS:
+ is the immediate subsequent sibling selector
~ is the any subsequent sibling selector
In conventional CSS, there is no previous sibling selector.
However, in the axe CSS post-processor library, there are 2 previous sibling selectors:
? is the immediate previous sibling selector (opposite of +)
! is the any previous sibling selector (opposite of ~)
Working Example:
In the example below:
.any-subsequent:hover ~ div selects any subsequent div
.immediate-subsequent:hover + div selects the immediate subsequent div
.any-previous:hover ! div selects any previous div
.immediate-previous:hover ? div selects the immediate previous div
div {
display: inline-block;
width: 60px;
height: 100px;
color: rgb(255, 255, 255);
background-color: rgb(255, 0, 0);
text-align: center;
vertical-align: top;
cursor: pointer;
opacity: 0;
transition: opacity 0.6s ease-out;
}
code {
display: block;
margin: 4px;
font-size: 24px;
line-height: 24px;
background-color: rgba(0, 0, 0, 0.5);
}
div:nth-of-type(-n+4) {
background-color: rgb(0, 0, 255);
}
div:nth-of-type(n+3):nth-of-type(-n+6) {
opacity: 1;
}
.any-subsequent:hover ~ div,
.immediate-subsequent:hover + div,
.any-previous:hover ! div,
.immediate-previous:hover ? div {
opacity: 1;
}
<h2>Hover over any of the blocks below</h2>
<div></div>
<div></div>
<div class="immediate-previous">Hover for <code>?</code> selector</div>
<div class="any-previous">Hover for <code>!</code> selector</div>
<div class="any-subsequent">Hover for <code>~</code> selector</div>
<div class="immediate-subsequent">Hover for <code>+</code> selector</div>
<div></div>
<div></div>
<script src="https://rouninmedia.github.io/axe/axe.js"></script>

Another flexbox solution
You can use inverse the order of elements in HTML. Then besides using order as in Michael_B's answer you can use flex-direction: row-reverse; or flex-direction: column-reverse; depending on your layout.
Working sample:
.flex {
display: flex;
flex-direction: row-reverse;
/* Align content at the "reversed" end i.e. beginning */
justify-content: flex-end;
}
/* On hover target its "previous" elements */
.flex-item:hover ~ .flex-item {
background-color: lime;
}
/* styles just for demo */
.flex-item {
background-color: orange;
color: white;
padding: 20px;
font-size: 3rem;
border-radius: 50%;
}
<div class="flex">
<div class="flex-item">5</div>
<div class="flex-item">4</div>
<div class="flex-item">3</div>
<div class="flex-item">2</div>
<div class="flex-item">1</div>
</div>

There is no official way to do that at the moment but you can use a little trick to achieve this ! Remember that it is experimental and it has some limitation ...
(check this link if you worries about navigator compatibility )
What you can do is use a CSS3 selector : the pseudo classe called nth-child()
#list>* {
display: inline-block;
padding: 20px 28px;
margin-right: 5px;
border: 1px solid #bbb;
background: #ddd;
color: #444;
margin: 0.4em 0;
}
#list :nth-child(-n+4) {
color: #600b90;
border: 1px dashed red;
background: orange;
}
<p>The oranges elements are the previous sibling li selected using li:nth-child(-n+4)</p>
<div id="list">
<span>1</span><!-- this will be selected -->
<p>2</p><!-- this will be selected -->
<p>3</p><!-- this will be selected -->
<div>4</div><!-- this will be selected -->
<div>5</div>
<p>6</p>
<p>7</p>
<p>8</p>
<p>9</p>
</div>
Limitations
You can't select previous elements based on the classes of the next elements
This is the same for pseudo classes

You could use double negation
SELECTOR:not([SELECTOR]FILTER):not([SELECTOR]FILTER + SELECTOR) { ... }
Replace SELECTOR with either the TAG or .CLASS ( Using #ID is probably too specific ).
Replace FILTER with some other :PSUEDO-SELECTOR (I've only tried :hover) or .CLASS (More for toggling through Javascript).
Since the typical usage will probably rely upon hovering (See example that follows)
/* Effect only limited when hovering */
TAG.CLASS:not(TAG.CLASS:hover):not(TAG.CLASS:hover + TAG.CLASS) {}
/* Effect only applied when hovering */
PARENT.CLASS:hover > CHILD.CLASS:not(CHILD.CLASS:hover):not(CHILD.CLASS:hover + CHILD.CLASS) {}
/* Solution */
div.parent:hover > div.child:not(:hover):not(:hover ~ .child) {
background-color:red;
border-radius:1.5em;
}
div.parent:hover > div.child:not(:hover):not(:hover ~ .child) > div {
background-color:yellow;
}
/* Make pretty (kinda) */
div.parent {
width:9em;
height:9em;
/* Layout */
display:grid;
grid-template-columns : auto auto auto;
grid-template-rows : auto auto auto;
}
div.child {
/* Dimensions */
height:3em;
width:3em;
/* Layout */
position:relative;
/* Cursor */
cursor: pointer;
/* Presentation */
border: 1px black solid;
border-radius:1.5em;
}
.star {
/* Dimensions */
width: 2.5em;
height: 2.5em;
/* Placement */
position:absolute;
top: 50%;
left: 50%;
transform:translate(-50%,-50%);
/* Geometry */
-webkit-clip-path: polygon(
50% 0%,
63% 38%,
100% 38%,
69% 59%,
82% 100%,
50% 75%,
18% 100%,
31% 59%,
0% 38%,
37% 38%
);
clip-path: polygon(
50% 0%,
63% 38%,
100% 38%,
69% 59%,
82% 100%,
50% 75%,
18% 100%,
31% 59%,
0% 38%,
37% 38%
);
/* Presentation */
background-color: lightgrey;
}
div.child:hover {
/* Presentation */
background-color:yellow;
border-radius:1.5em;
}
div.child:hover > div.star {
/* Presentation */
background-color:red;
}
<div class="parent">
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
<div class="child" href="#"><div class="star"></div></div>
</div>

Overriding the styles of next siblings on hover, so that it looks like only previous siblings have styles added on hover.
ul li {
color: red;
}
ul:hover li {
color: blue;
}
ul:hover li:hover ~ li{
color: red;
}
<ul>
<li>item 1</li>
<li>item 2</li>
<li>item 3</li>
</ul>

If you know the exact position an :nth-child()-based exclusion of all following siblings would work.
ul li:not(:nth-child(n+3))
Which would select all lis before the 3rd (e.g. 1st and 2nd). But, in my opinion this looks ugly and has a very tight usecase.
You also could select the nth-child right-to-left:
ul li:nth-child(-n+2)
Which does the same.

No. It is not possible via CSS. It takes the "Cascade" to heart ;-).
However, if you are able to add JavaScript to your page, a little bit of jQuery could get you to your end goal.
You can use jQuery's find to perform a "look-ahead" on your target element/class/id, then backtrack to select your target.
Then you use jQuery to re-write the DOM (CSS) for your element.
Based on this answer by Mike Brant,
the following jQuery snippet could help.
$('p + ul').prev('p')
This first selects all <ul>s that immediately follow a <p>.
Then it "backtracks" to select all the previous <p>s from that set of <ul>s.
Effectively, "previous sibling" has been selected via jQuery.
Now, use the .css function to pass in your CSS new values for that element.
In my case I was looking to find a way to select a DIV with the id #full-width, but ONLY if it had a (indirect) descendant DIV with the class of .companies.
I had control of all the HTML under .companies, but could not alter any of the HTML above it.
And the cascade goes only 1 direction: down.
Thus I could select ALL #full-widths.
Or I could select .companies that only followed a #full-width.
But I could not select only #full-widths that proceeded .companies.
And, again, I was unable to add .companies any higher up in the HTML. That part of the HTML was written externally, and wrapped our code.
But with jQuery, I can select the required #full-widths, then assign the appropriate style:
$("#full-width").find(".companies").parents("#full-width").css( "width", "300px" );
This finds all #full-width .companies, and selects just those .companies, similar to how selectors are used to target specific elements in standard in CSS.
Then it uses .parents to "backtrack" and select ALL parents of .companies,
but filters those results to keep only #fill-width elements, so that in the end,
it only selects a #full-width element if it has a .companies class descendant.
Finally, it assigns a new CSS (width) value to the resulting element.
$(".parent").find(".change-parent").parents(".parent").css( "background-color", "darkred");
div {
background-color: lightblue;
width: 120px;
height: 40px;
border: 1px solid gray;
padding: 5px;
}
.wrapper {
background-color: blue;
width: 250px;
height: 165px;
}
.parent {
background-color: green;
width: 200px;
height: 70px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<html>
<div class="wrapper">
<div class="parent">
"parent" turns red
<div class="change-parent">
descendant: "change-parent"
</div>
</div>
<div class="parent">
"parent" stays green
<div class="nope">
descendant: "nope"
</div>
</div>
</div>
Target <b>"<span style="color:darkgreen">parent</span>"</b> to turn <span style="color:red">red</span>.<br>
<b>Only</b> if it <b>has</b> a descendant of "change-parent".<br>
<br>
(reverse cascade, look ahead, parent un-descendant)
</html>
jQuery Reference Docs:
$() or jQuery(): DOM element.
.find: Get the descendants of each element in the current set of matched elements, filtered by a selector, jQuery object, or element.
.parents: Get the immediately preceding sibling of each element in the set of matched elements. If a selector is provided, it retrieves the previous sibling only if it matches that selector (filters the results to only include the listed elements/selectors).
.css: Set one or more CSS properties for the set of matched elements.

My requirement was to select currently hovered item's previous and next two siblings with the help of #Quentin 's answer I selected previous siblings.
.child{
width: 25px;
height: 25px;
}
.child:hover {
background:blue;
}
.child:has( + .child:hover) {
background: yellow;
}
.child:has(+ .child + .child:hover){
background:green;
}
.child:hover + .child {
background: red;
}
.child:hover + .child + .child {
background: magenta;
}
<ul class="parent">
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
</ul>
To select all previous siblings
.child {
width: 25px;
height: 25px;
}
.child:hover {
background: blue;
}
.child:has(~ .child:hover) {
background: red;
}
<ul class="parent">
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
<li class="child"></li>
</ul>

Depending on your exact objective, there is a way to achieve the usefulness of a parent selector without using one (even if one were to exist)...
Say we have:
<div>
<ul>
<li><a>Pants</a></li>
<li><a>Socks</a></li>
<ul>
<li><a>White socks</a></li>
<li><a>Blue socks</a></li>
</ul>
</ul>
</div>
What can we do to make the Socks block (including sock colours) stand out visually using spacing?
What would be nice but doesn't exist:
ul li ul:parent {
margin-top: 15px;
margin-bottom: 15px;
}
What does exist:
li > a {
margin-top: 15px;
display: block;
}
li > a:only-child {
margin-top: 0px;
}
This sets all anchor links to have 15px margin on the top and resets it back to 0 for those with no UL elements (or other tags) inside LIs.

/* Add a style to all the children, then undo the style to the target
and sibling children of your target. */
ul>li {
color: red;
}
ul>li.target,
ul>li.target~li {
color: inherit;
}
<ul>
<li>before</li>
<li class="target">target</li>
<li>after</li>
<li>after</li>
</ul>

There is no "previous" sibling selector unfortunately, but you can possibly still get the same effect by using positioning (e.g. float right). It depends on what you are trying to do.
In my case, I wanted a primarily CSS 5-star rating system. I would need to color (or swap the icon of) the previous stars. By floating each element right, I am essentially getting the same effect (the html for the stars thus must be written 'backwards').
I'm using FontAwesome in this example and swapping between the unicodes of fa-star-o and fa-star
http://fortawesome.github.io/Font-Awesome/
CSS:
.fa {
display: inline-block;
font-family: FontAwesome;
font-style: normal;
font-weight: normal;
line-height: 1;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
}
/* set all stars to 'empty star' */
.stars-container {
display: inline-block;
}
/* set all stars to 'empty star' */
.stars-container .star {
float: right;
display: inline-block;
padding: 2px;
color: orange;
cursor: pointer;
}
.stars-container .star:before {
content: "\f006"; /* fontAwesome empty star code */
}
/* set hovered star to 'filled star' */
.star:hover:before{
content: "\f005"; /* fontAwesome filled star code */
}
/* set all stars after hovered to'filled star'
** it will appear that it selects all after due to positioning */
.star:hover ~ .star:before {
content: "\f005"; /* fontAwesome filled star code */
}
HTML:
(40)
JSFiddle: http://jsfiddle.net/andrewleyva/88j0105g/

I needed a solution to select the previous sibling tr. I came up with this solution using React and Styled-components. This is not my exact solution (This is from memory, hours later). I know there is a flaw in the setHighlighterRow function.
OnMouseOver a row will set the row index to state, and rerender the previous row with a new background color
class ReactClass extends Component {
constructor() {
this.state = {
highlightRowIndex: null
}
}
setHighlightedRow = (index) => {
const highlightRowIndex = index === null ? null : index - 1;
this.setState({highlightRowIndex});
}
render() {
return (
<Table>
<Tbody>
{arr.map((row, index) => {
const isHighlighted = index === this.state.highlightRowIndex
return {
<Trow
isHighlighted={isHighlighted}
onMouseOver={() => this.setHighlightedRow(index)}
onMouseOut={() => this.setHighlightedRow(null)}
>
...
</Trow>
}
})}
</Tbody>
</Table>
)
}
}
const Trow = styled.tr`
& td {
background-color: ${p => p.isHighlighted ? 'red' : 'white'};
}
&:hover {
background-color: red;
}
`;

There isn't, and there is.
If you must place the label before the input, just place the label after the input and keep both the label & the input inside a div, and style the div as following :
.input-box {
display: flex;
flex-direction: column-reverse;
}
<div class="input-box">
<input
id="email"
class="form-item"
/>
<label for="email" class="form-item-header">
E-Mail*
</label>
</div>
Now you can apply the standard next sibling styling options available in css, and it will appear like you are using a previous sibling styling.

I've found the easiest solution. It might only apply based on what you're doing.
Let's say you want to hover on "sibling_2" to change "sibling_1" in the example below:
<div class='parent'>
<div class='sibling_1'></div>
<div class='sibling_2'></div>
</div>
Since there's no previous element selector you can simply switch 'sibling_1' and 'sibling_2' around and apply so they look the same.
.parent {
display: flex;
flex-direction: row-reverse;
}
Now you can select them like that.
.sibling_1:hover ~ .sibling_2 {
#your CSS
}

You can use :has() as following.
.thePrevious:has(+ .theNextSibling)
I used this for fixing overlapping bootstrap modals as follows. Any previous modals will be hidden if there are multiple.
.modal.show.modal--open:has(~ .modal.show.modal--open){
opacity: 0;
}

There is no such selector, but in the DOM API has a pretty read-only property
Node.previousSibling

I fixed this problem by putting my elements in a flexbox and then using flex-direction: column-reverse.
Then I had to invert my elements in the HTML manually (put them in reverse order), and it looked normal and it worked!
<div style="display: flex; flex-direction: column-reverse">
<a class="element2">Element 2</a>
<a class="element1">Element 1</a>
</div>
...
<style>
.element2:hover + element1 {
...
}
</style>

I had a similar problem and found out that all problem of this nature can be solved as follows:
give all your items a style.
give your selected item a style.
give next items a style using + or ~.
and this way you'll be able to style your current, previous items(all items overridden with current and next items) and your next items.
example:
/* all items (will be styled as previous) */
li {
color: blue;
}
/* the item i want to distinguish */
li.milk {
color: red;
}
/* next items */
li ~ li {
color: green;
}
<ul>
<li>Tea</li>
<li class="milk">Milk</li>
<li>Juice</li>
<li>others</li>
</ul>
Hope it helps someone.

here is the link for a similar question
CSS select all previous siblings for a star rating
So I post my solution using bits of everyones responses and anyone can use it as reference and possibliy recommend improvements.
// Just to check input value
// Consts
const starRadios = document.querySelectorAll('input[name="rating"]');
// EventListeners
starRadios.forEach((radio) => radio.addEventListener('change', getStarRadioValue));
// Get star radio value
function getStarRadioValue(event) {
alert(event.target.value)
// Do something with it
};
.star-rating {
font-size: 1.5rem;
unicode-bidi: bidi-override;
direction: rtl;
text-align: left;
}
.star-rating.editable label:hover {
cursor: pointer;
}
.star-rating.editable .icon-star:hover,
.star-rating.editable .icon-star:hover ~ .icon-star {
background-color: #fb2727 !important;
}
.icon-star {
position: relative;
background-color: #72747d;
width: 32px;
height: 32px;
display: inline-block;
transition: background-color 0.3s ease;
}
.icon-star.filled {
background-color: #fb2727;
}
.icon-star > label {
display: inline-block;
width: 100%;
height: 100%;
left: 0;
top: 0;
position: absolute;
}
.icon-star > label > input[type="radio"] {
position: absolute;
top: 0;
left: 0;
transform: translateY(50%) translateX(50%);
display: none;
}
<div class="star-rating editable">
<span class="icon-star">
<label>
<input type="radio" name="rating" value="5" />
</label>
</span>
<span class="icon-star">
<label>
<input type="radio" name="rating" value="4" />
</label>
</span>
<span class="icon-star">
<label>
<input type="radio" name="rating" value="3" />
</label>
</span>
<span class="icon-star">
<label>
<input type="radio" name="rating" value="2" />
</label>
</span>
<span class="icon-star">
<label>
<input type="radio" name="rating" value="1" />
</label>
</span>
</div>

For my use case was needed to change previous element style on focus and hover only having 2 items in parent element. to do so used :focus-within and :hover pseudo-classes.
like so selecting whenever focus/hover event occurs
.root-element:hover .element-to-style { background-color: red;}
.root-element:focus-within .element-to-style { background-color: green;}
<div class="root-element">
<span class="element-to-style"> TextFocused</span>
<input type="text" placeholder="type To Style"/>
</div>

There is actually no selector that can select the previous sibling in css. But it is possible to use certain tricks.
For example, if you want to change the style of the previous element when you hover over any element, you can use this:
<!DOCTYPE html>
<html lang="en">
<head>
<style>
.element:has(+ .next-element:hover){
/* here your style for .element */
}
</style>
</head>
<body>
<div class="container">
<div class="element"></div>
<div class="next-element"></div>
</div>
</body>
</html>
In this situation if you hover over .next-element the style of .element will change as you defined above

I had this same problem, while I was trying to change prepend icon fill color on input focus, my code looked something like this:
<template #append>
<b-input-group-text><strong class="text-danger">!</strong></b-input-group-text>
</template>
<b-form-input id="password_confirmation" v-model="form.password_confirmation" type="password" placeholder="Repeat password" autocomplete="new-password" />
The problem was that I'm using a vue-bootstrap slot to inject the prepend, so even if i change the location still get rendered after the input
Well my solution was to swipe their location, and add custom prepend and used ~ symbol, as css doesn't support previous sibling.
<div class="form-input-prepend">
<svg-vue icon="common.lock" />
</div>
<b-form-input id="password_confirmation" v-model="form.password_confirmation" type="password" placeholder="Repeat password" autocomplete="new-password" />
Scss style
.form-control:focus ~ .form-input-prepend {
svg path {
fill: $accent;
}
}
So just try to change its position, and if necessary use css order or position: absolute; to achieve what you want, and to avoid using javascript for this kind of needs.

Though there is no previous CSS selector. I've found a quick and easy method to select one yourself.
Here is the HTML markup:
<div class="parent">
<div class="child-1"></div>
<div class="child-2"></div>
</div>
In your JavaScript simply do:
document.querySelector(".child-2").parentElement.querySelector(".child-1")
This will first select the parent div and later on select the child-1 div from the child-2 div.
If you are using jQuery you can simply do:
$(".child-2").prev()

Related

radio button having multiple forms with style [duplicate]

Is it possible to apply a css(3) style to a label of a checked radio button?
I have the following markup:
<input type="radio" id="rad" name="radio"/>
<label for="rad">A Label</label>
What I was hoping is that
label:checked { font-weight: bold; }
would do something, but alas it does not (as I expected).
Is there a selector that can achieve this sort of functionality? You may surround with divs etc if that helps, but the best solution would be one that uses the label ''for'' attribute.
It should be noted that I am able to specify browsers for my application, so best of class css3 etc please.
try the + symbol:
It is Adjacent sibling combinator. It combines two sequences of simple selectors having the same parent and the second one must come IMMEDIATELY after the first.
As such:
input[type="radio"]:checked+label{ font-weight: bold; }
//a label that immediately follows an input of type radio that is checked
works very nicely for the following markup:
<input id="rad1" type="radio" name="rad"/><label for="rad1">Radio 1</label>
<input id="rad2" type="radio" name="rad"/><label for="rad2">Radio 2</label>
... and it will work for any structure, with or without divs etc as long as the label follows the radio input.
Example:
input[type="radio"]:checked+label { font-weight: bold; }
<input id="rad1" type="radio" name="rad"/><label for="rad1">Radio 1</label>
<input id="rad2" type="radio" name="rad"/><label for="rad2">Radio 2</label>
I know this is an old question, but if you would like to have the <input> be a child of <label> instead of having them separate, here is a pure CSS way that you could accomplish it:
:checked + span { font-weight: bold; }
Then just wrap the text with a <span>:
<label>
<input type="radio" name="test" />
<span>Radio number one</span>
</label>
See it on JSFiddle.
I forget where I first saw it mentioned but you can actually embed your labels in a container elsewhere as long as you have the for= attribute set. So, let's check out a sample on SO:
* {
padding: 0;
margin: 0;
background-color: #262626;
color: white;
}
.radio-button {
display: none;
}
#filter {
display: flex;
justify-content: center;
}
.filter-label {
display: inline-block;
border: 4px solid green;
padding: 10px 20px;
font-size: 1.4em;
text-align: center;
cursor: pointer;
}
main {
clear: left;
}
.content {
padding: 3% 10%;
display: none;
}
h1 {
font-size: 2em;
}
.date {
padding: 5px 30px;
font-style: italic;
}
.filter-label:hover {
background-color: #505050;
}
#featured-radio:checked~#filter .featured,
#personal-radio:checked~#filter .personal,
#tech-radio:checked~#filter .tech {
background-color: green;
}
#featured-radio:checked~main .featured {
display: block;
}
#personal-radio:checked~main .personal {
display: block;
}
#tech-radio:checked~main .tech {
display: block;
}
<input type="radio" id="featured-radio" class="radio-button" name="content-filter" checked="checked">
<input type="radio" id="personal-radio" class="radio-button" name="content-filter" value="Personal">
<input type="radio" id="tech-radio" class="radio-button" name="content-filter" value="Tech">
<header id="filter">
<label for="featured-radio" class="filter-label featured" id="feature-label">Featured</label>
<label for="personal-radio" class="filter-label personal" id="personal-label">Personal</label>
<label for="tech-radio" class="filter-label tech" id="tech-label">Tech</label>
</header>
<main>
<article class="content featured tech">
<header>
<h1>Cool Stuff</h1>
<h3 class="date">Today</h3>
</header>
<p>
I'm showing cool stuff in this article!
</p>
</article>
<article class="content personal">
<header>
<h1>Not As Cool</h1>
<h3 class="date">Tuesday</h3>
</header>
<p>
This stuff isn't nearly as cool for some reason :(;
</p>
</article>
<article class="content tech">
<header>
<h1>Cool Tech Article</h1>
<h3 class="date">Last Monday</h3>
</header>
<p>
This article has awesome stuff all over it!
</p>
</article>
<article class="content featured personal">
<header>
<h1>Cool Personal Article</h1>
<h3 class="date">Two Fridays Ago</h3>
</header>
<p>
This article talks about how I got a job at a cool startup because I rock!
</p>
</article>
</main>
Whew. That was a lot for a "sample" but I feel it really drives home the effect and point: we can certainly select a label for a checked input control without it being a sibling. The secret lies in keeping the input tags a child to only what they need to be (in this case - only the body element).
Since the label element doesn't actually utilize the :checked pseudo selector, it doesn't matter that the labels are stored in the header. It does have the added benefit that since the header is a sibling element we can use the ~ generic sibling selector to move from the input[type=radio]:checked DOM element to the header container and then use descendant/child selectors to access the labels themselves, allowing the ability to style them when their respective radio boxes/checkboxes are selected.
Not only can we style the labels, but also style other content that may be descendants of a sibling container relative to all of the inputs. And now for the moment you've all been waiting for, the JSFIDDLE! Go there, play with it, make it work for you, find out why it works, break it, do what you do!
Hopefully that all makes sense and fully answers the question and possibly any follow ups that may crop up.
If your input is a child element of the label and you have more than one labels, you can combine #Mike's trick with Flexbox + order.
label.switchLabel {
display: flex;
justify-content: space-between;
width: 150px;
}
.switchLabel .left { order: 1; }
.switchLabel .switch { order: 2; }
.switchLabel .right { order: 3; }
/* sibling selector ~ */
.switchLabel .switch:not(:checked) ~ span.left { color: lightblue }
.switchLabel .switch:checked ~ span.right { color: lightblue }
/* style the switch */
:root {
--radio-size: 14px;
}
.switchLabel input.switch {
width: var(--radio-size);
height: var(--radio-size);
border-radius: 50%;
border: 1px solid #999999;
box-sizing: border-box;
outline: none;
-webkit-appearance: inherit;
-moz-appearance: inherit;
appearance: inherit;
box-shadow: calc(var(--radio-size) / 2) 0 0 0 gray, calc(var(--radio-size) / 4) 0 0 0 gray;
margin: 0 calc(5px + var(--radio-size) / 2) 0 5px;
}
.switchLabel input.switch:checked {
box-shadow: calc(-1 * var(--radio-size) / 2) 0 0 0 gray, calc(-1 * var(--radio-size) / 4) 0 0 0 gray;
margin: 0 5px 0 calc(5px + var(--radio-size) / 2);
}
<label class="switchLabel">
<input type="checkbox" class="switch" />
<span class="left">Left</span>
<span class="right">Right</span>
</label>
asd
html
<label class="switchLabel">
<input type="checkbox" class="switch"/>
<span class="left">Left</span>
<span class="right">Right</span>
</label>
css
label.switchLabel {
display: flex;
justify-content: space-between;
width: 150px;
}
.switchLabel .left { order: 1; }
.switchLabel .switch { order: 2; }
.switchLabel .right { order: 3; }
/* sibling selector ~ */
.switchLabel .switch:not(:checked) ~ span.left { color: lightblue }
.switchLabel .switch:checked ~ span.right { color: lightblue }
See it on JSFiddle.
note: Sibling selector only works within the same parent. To work around this, you can make the input hidden at top-level using #Nathan Blair hack.
UPDATE:
This only worked for me because our existing generated html was wacky, generating labels along with radios and giving them both checked attribute.
Never mind, and big ups for Brilliand for bringing it up!
If your label is a sibling of a checkbox (which is usually the case), you can use the ~ sibling selector, and a label[for=your_checkbox_id] to address it... or give the label an id if you have multiple labels (like in this example where I use labels for buttons)
Came here looking for the same - but ended up finding my answer in the docs.
a label element with checked attribute can be selected like so:
label[checked] {
...
}
I know it's an old question, but maybe it helps someone out there :)

Is it possible to link to the same page with different CSS conditions active, depending on which Link I clicked on?

I have three different Links that all lead to the same page. But I need the page to load with different CSS settings (depending on which link was clicked, certain elements should be hidden on the new page).
Is that possible? Thank you!
Sure, you can use the :target pseudo-class to do so.
From MDN:
The :target CSS pseudo-class represents a unique element (the target element) with an id matching the URL's fragment.
With target, you click a link, like page.html#some-condition, and in your CSS, listen for that condition. When the id matches the hash in the address bar, you have a match and the target is met.
A link
<div id="some-condition"></div>
#some-condition:target {
/* style appropriately */
}
Here's a quick demo. In this case, the links contain the ids, but as demonstrated above, you can structure things however you'd like.
#red:target ~ .result {
background-color: red;
}
#blue:target ~ .result {
background-color: blue;
}
#green:target ~ .result {
background-color: green;
}
.result {
width: 100px;
height: 100px;
display: inline-block;
border: 1px solid;
background-color: #fff;
transition: 0.3s background-color;
}
<a id="red" href="#red">Red</a>
<a id="blue" href="#blue">Blue</a>
<a id="green" href="#green">Green</a>
<div class="result"></div>
jsFiddle

Make specific underlying elements to behave/render like being above the overlay

How can one keep just some child elements clearly visible, when the parent is opaque, without affecting the rendering performances of the page?
I am trying to make specific elements under an overlay to react and to be rendered as if they were above the overlay.
is there any way in CSS to influence the rendering of specific underlaying elements when blending with the overlay? Or is the mix-blend-mode working just top-down direction? (e.g. I'd like to tell just .visible to blend with the overlay differently; while all the rest underneath should have the normal blending)
is filter working just on the selected element? Doesn't it affects the rendering of underlaying elements, when the selected element has opacity?
(e.g. Make the overlay make everything below as greyscale)
And, since I assume the answers of both questions above won't help me, the actual question is:
Is it possible to visually compensate, on the .visible elements, the opacify effect
Note:
I know that one solution could be to use a selector:
div.data :not(.visible) { opacify: .5; }
rather than using an overlay, but I have doubts how performances would be (especially on not powerful mobiles) trying to apply opacify to the thousands of .data-subelements that would be :not(.visible). And also the click|hover on the opacified/disabled elements wouldn't be prevented (while I want just click on the area of the .visible to be caught).
Any performant solution? Or what I am asking is impossible nowadays?
I tried to write an example snippet but I couldn't find a way to solve my problem.
Javascript is also accepted
The priority is to have that visual/functional effect with decent performances on a generic mobile, when the number of li is above 100 and each of them contains 100 DOM elements.
/* structure */
div.data { display: table; }
ul { display: table-row-group; }
li { display: table-row; }
li > div { display: table-cell; }
/* style */
li > div.content { color: red; }
.visible { color: green; border: 1px dashed black; padding: 0 5px; }
/* Overlay */
.data:after {
content: '';
position: absolute;
top: 0; bottom: 0; right: 0; left: 0;
}
/* reduce emphasis */
.data:after {
background-color: white;
opacity: .5;
}
/* visual "disabled" effect */
.data:after {
filter: grayscale(100%);
}
<div class="data">
<ul>
<li>
<div class="content">Foobar1</div>
<div>
<span class="content">other content</span>
<span class="visible">
Not opaque
<input type="checkbox" checked />
</span>
</div>
</li>
<li>
<div class="content">Foobar2</div>
<div>
<span class="content">other content</span>
<span class="visible">
Not opaque
<input type="checkbox" />
</span>
</div>
</li>
</ul>
</div>

Show div when post has class

Update
I'd modded the CSS given by David Thomas a bit. Its now a banner.
.div.popular::before {
/* setting the default styles for
the generated content: */
display: block;
width: 10em;
height: 2em;
line-height: 2em;
text-align: center;
background: #F60;
color: #fff;
font-size: 1.4rem;
position: absolute;
top: 30px;
right: 0px;
z-index: 1;
}
I would like to make a folded corner sort of like in this post: Folded banner using css
--- Original post ---
Let me first explain what I'm trying to do. I'm trying to give some post some extra attention by making a little circle with some call-to-action text in it.
But I only want this to trigger when a div has a specific class.
So if the div the class populair or sale I would like to have a little circle show up on that post. This script what I am using right now.
$(document).ready(function($){
if($("#front-page-items").hasClass('populair')){
$(".populair-div").show();
}
if($("#front-page-items").hasClass('sale')){
$(".sale-div").show();
}
});
And this HTML:
<div class="populair-div" style="display:none;">
<strong>Populair</strong>
</div>
<div class="sale-div" style="display:none;">
<strong>Sale</strong>
</div>
But this only show's the populair-div and not the other one. I'm guessing my script is wrong. Should I use else for all the other call-to-action classes?
$(document).ready(function($){
if($("#front-page-items").hasClass('populair')){
$(".populair-div").show();
}
else($("#front-page-items").hasClass('sale')){
$(".sale-div").show();
}
else($("#front-page-items").hasClass('Free')){
$(".free-div").show();
} // and so on
});
Is there someone that could help me out? Also is it possible to echo the div so I don't have to write a whole div for every call-to-action div?
For something like this, where the displayed text is explicitly linked to the class-name of the element it's easiest to use CSS and the generated content available, effectively hiding the elements you don't wish to show by default and then explicitly allowing elements you want to show, along with the generated content of those elements (using the ::before and ::after pseudo-elements:
div {
/* preventing <div> elements
from showing by default: */
display: none;
}
div.populair-div,
div.sale-div {
/* ensuring that elements matching
the selectors above (<div>
elements with either the 'sale-div'
or 'populair-div' class-names
are shown: */
display: block;
}
div.populair-div::before,
div.sale-div::before {
/* setting the default styles for
the generated content: */
display: block;
width: 4em;
height: 4em;
line-height: 4em;
text-align: center;
border: 3px solid transparent;
border-radius: 50%;
}
div.populair-div::before {
/* setting the text with the
"content" property: */
content: "Popular";
/* providing a specific colour
for the generated contents'
border: */
border-color: #0c0;
}
div.sale-div::before {
content: "Sale";
border-color: #f90;
}
/* entirely irrelevant, just so you can
see a (slightly prettified) difference
should you remove the default display
property for the <div> elements: */
code {
background-color: #ddd;
}
em {
font-style: italic;
}
<div class="neither-popular-nor-sale">
<p>
This element should not be shown, it has neither a class of <code>"populair-div"</code> <em>or</em> <code>"sale-div"</code>.
</p>
</div>
<div class="populair-div">
</div>
<div>Also not to be shown.</div>
<div class="sale-div">
</div>
You can use toggle function for this. It will be shorter and clearer.
Display or hide the matched elements.
Note: The buttons is for tests.
$(document).ready(function($){
init();
});
function init() {
$(".populair-div").toggle($("#front-page-items").hasClass('populair'));
$(".sale-div").toggle($("#front-page-items").hasClass('sale'));
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="front-page-items" class="populair sale"></div>
<div class="populair-div">populair-div</div>
<div class="sale-div">sale-div</div>
<hr />
<button onclick="document.getElementById('front-page-items').classList.toggle('populair');init()">toggle populair</button>
<button onclick="document.getElementById('front-page-items').classList.toggle('sale');init()">toggle sale</button>

Preserve visual order of mixed floated elements

JSFiddle : https://jsfiddle.net/ttpkfs9s/
I have a UI component that should arrange elements into a row and displays them with elements on the left and on the right, with the active element being in the middle:
[1][2][3] [4] [5][6][7][8][9]
So far I have been achieving this by floating elements left and right, while keeping the one in the middle float: none; (this is good enough).
However, way too late into implementing the navigation JS I realised that I've made a huge mistake, and that the actual order the elements are displayed in are as follows:
[1][2][3] [4] [9][8][7][6][5]
Which is a huge problem as these elements are supposed to be clickable /facepalm
Are there any at most not too invasive CSS/HTML options I can use to get the displayed order correct?
EDIT: I missed the part about you needing the active div to always be in the center of the row.
You could contain the div's inside a container, and float the container insted, but that would probably be hard to do.
I took the liberty of changing things up abit, maybe you can use it, maybe u can't.
I set all items to the same width, and made a function for resizing the div's after u click one of the items.
https://jsfiddle.net/ttpkfs9s/1/
html
<div class="row">
<div class="item left">1</div>
<div class="item left">2</div>
<div class="item left">3</div>
<div class="item left">4</div>
<div class="item">5</div>
<div class="item">6</div>
<div class="item">7</div>
<div class="item">8</div>
<div class="item">9</div>
<div class="item">10</div>
css
.row {
height: 150px;
background: blue;
width: 100%;
}
.item {
float: left;
padding: 2.5px;
color: white;
width: 9.4%;
height: 100%;
background: red;
margin: 0 0.3%;
box-sizing: border-box;
transition: 0.7s linear;
}
.active {
color: black;
background: yellow;
}
js
function setWidth(){
if($(".item").hasClass("active")){
$(".item").width("6%");
$(".active").width("40%");
};
}
$(".item").click(function(){
$(".item").removeClass("active");
$(this).addClass("active");
setWidth();
})

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