Hide sibling divs on hover in CSS

user_14916304 0
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I'm trying to create a CSS grid (or flex) where each item expands on hover while other items are hidden. I'm able to get the first item to work this way using :nthchild but obviously this nthchild doesn't work with previous items in the grid.

<div class="container">

<div id="a" class="box">Div A Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
<div id="b" class="box">Div B</div>
<div id="c" class="box">Div C</div>


</div>

CSS

.container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 20px;
  margin: 20px;
}
 
.box {
   background-color: grey;
   padding: 20px;
}
  
#a:hover {
     grid-column: 1 / 4;
}
 
#a:hover ~ :nth-child(-n+8) {
  display: none;
}

#b:hover {
     grid-column: 1 / 4;
}
 
#b:hover ~ :nth-child(-n+8) {
  display: none;
}

Here's the code on jsfiddle: https://jsfiddle.net/ktz8qdcp/20/

Appreciate your help!

responsive-design css-grid css html javascript
2 Answers

I believe using !important is justified in this case. Since display: block!important; is specified before hiding the children of the container, it will keep the relevant flex item visible and expand to 100%.

I have used background colors to demonstrate the 100% width. Be aware that the order of CSS definitions is important here.

.container {
  display: flex;
}

.container>.box {
  width: calc( 100% / 3);
}

#a {
  background: lightblue;
}

#b {
  background: lightgray;
}

#c {
  background: lightgreen;
}

#a:hover,
#b:hover,
#c:hover {
  display: block!important;
  width: 100%;
}

.container:hover>.box {
  display: none;
}
<div class="container">
  <div id="a" class="box">Div A Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
    It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
    publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer
    took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset
    sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
  <div id="b" class="box">Div B</div>
  <div id="c" class="box">Div C</div>
</div>

user_31320190

Knowing that an hidden element cannot be hovered... I suggest to play on the opacity instead.

.container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-gap: 20px;
  margin: 20px;
}

.box {
  background-color: grey;
  padding: 20px;
  opacity: 0;
  transition: opacity 1s;
}

.box:hover{
  opacity: 1;
}
<div class="container">

  <div id="a" class="box">Div A Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
    It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop
    publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer
    took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset
    sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.</div>
  <div id="b" class="box">Div B</div>
  <div id="c" class="box">Div C</div>


</div>

user_21595280
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