Hover causing opacity problem in CSS

Question

Hover causing opacity problem in CSS

Check out my code snippet on JSFiddle: http://jsfiddle.net/Vbtts/2624/ Here is the HTML structure:

    <a href="#" class="col-xs-6 col-sm-4 big-container with-background">
        <div class="bottom-align">
            <label class="uppercase">preséntation</label>
            <h2>Une entreprise<br> intégrée pour<br> contrôler la qualité<br> de toutes les étapes<br> des projets></h2>
        </div>
   </a>

And here's the corresponding CSS:

.with-background{width:100%;background:url(https://cask.scotch.io/2015/04/scotch-box-sidebar.png);display:block;height:200px;}
.with-background:hover{opacity:0.7}

I'm trying to achieve a hover effect where only the background image has reduced opacity, not the text content (label and h2). Any suggestions on how I can accomplish this? Thank you!

html css

Answer 1

Answer №1

It's not possible to do so. However, there are two alternative solutions you can try:

1) Adjust the opacity of the png background image and place it on a black background using Photoshop/GIMP:

 .background {
      background: url(your-semitransp.png) #000;
 }
 .background:hover {
      background-color: transparent;
 }

By setting the background color to #000, you can mimic 100% opacity and then remove it on hover to make the background semitransparent.

2) Use two separate divs:

Create a structure like this:

<div class="wrap">
   <div class="background"></div>
   <div class="text"></div>
</div>

You can position the background absolutely and place the text above it.

 .wrap { position : relative; }
 .background {
     position :absolute;
     top: 0;
     left: 0;
     z-index: 0;
 }
 .text {
     position :absolute;
     top: 0;
     left: 0;
     z-index: 1;
 }
 .wrap:hover .background{ 
     opacity: 0.7;
 }

Using the ::after or ::before pseudo-elements:

You can achieve this by visiting your fiddle link:

http://jsfiddle.net/Vbtts/2632/

However, I personally dislike using negative z-index values, so I wouldn't recommend this approach.

Answer 2

It's not possible to do so. However, there are two alternative solutions you can try:

1) Adjust the opacity of the png background image and place it on a black background using Photoshop/GIMP:

 .background {
      background: url(your-semitransp.png) #000;
 }
 .background:hover {
      background-color: transparent;
 }

By setting the background color to #000, you can mimic 100% opacity and then remove it on hover to make the background semitransparent.

2) Use two separate divs:

Create a structure like this:

<div class="wrap">
   <div class="background"></div>
   <div class="text"></div>
</div>

You can position the background absolutely and place the text above it.

 .wrap { position : relative; }
 .background {
     position :absolute;
     top: 0;
     left: 0;
     z-index: 0;
 }
 .text {
     position :absolute;
     top: 0;
     left: 0;
     z-index: 1;
 }
 .wrap:hover .background{ 
     opacity: 0.7;
 }

Using the ::after or ::before pseudo-elements:

You can achieve this by visiting your fiddle link:

http://jsfiddle.net/Vbtts/2632/

However, I personally dislike using negative z-index values, so I wouldn't recommend this approach.

Answer 3

Answer №2

I have made some updates to your jsfiddle, try using a before or after element in your CSS

.with-background{
  width:100%;
  display:block;
  height:200px;
  position: relative;
}
.with-background:before{
  width:100%;
  background:url(https://example.com/image.jpg);
  display:block;
  height:100%;
  content: " "; 
  position: absolute;
  top:0;
  left:0;
  z-index: -1;
}
.with-background:hover:before{opacity:0.2}

http://jsfiddle.net/Abcde/1234/

If you prefer to avoid negative z-index, you can also try this approach: http://jsfiddle.net/Fghij/5678/

Answer 4

I have made some updates to your jsfiddle, try using a before or after element in your CSS

.with-background{
  width:100%;
  display:block;
  height:200px;
  position: relative;
}
.with-background:before{
  width:100%;
  background:url(https://example.com/image.jpg);
  display:block;
  height:100%;
  content: " "; 
  position: absolute;
  top:0;
  left:0;
  z-index: -1;
}
.with-background:hover:before{opacity:0.2}

http://jsfiddle.net/Abcde/1234/

If you prefer to avoid negative z-index, you can also try this approach: http://jsfiddle.net/Fghij/5678/

Answer 5

Answer №3

While there isn't a CSS property called background-opacity, you can mimic it by adding a pseudo element with regular opacity that covers the entire element. This way, you can achieve the appearance of a transparent background without altering the HTML structure.

.with-background::after {
  content: "";
  background: url(https://example.com/background-image.jpg);
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  position: absolute;
  z-index: -1;   
}

.with-background:hover::after {
  opacity: 0.7;
}

You can view the updated jsfiddle here: https://jsfiddle.net/example/123/

For more information, check out this resource: https://example.com/tutorial

Answer 6

While there isn't a CSS property called background-opacity, you can mimic it by adding a pseudo element with regular opacity that covers the entire element. This way, you can achieve the appearance of a transparent background without altering the HTML structure.

.with-background::after {
  content: "";
  background: url(https://example.com/background-image.jpg);
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  position: absolute;
  z-index: -1;   
}

.with-background:hover::after {
  opacity: 0.7;
}

You can view the updated jsfiddle here: https://jsfiddle.net/example/123/

For more information, check out this resource: https://example.com/tutorial

Answer 7

Answer №4

To achieve the desired effect, absolute positioning should be utilized. This will allow you to position the image behind the text without it being wrapped.

I have made changes to your fiddle as shown below:

<a href="#" class="col-xs-6 col-sm-4 big-container">
  <div class="with-background"></div>
    <div class="bottom-align">
                            <label class="uppercase">presentation</label>
                            <h2>A unified company<br> committed to<br> ensuring quality control<br> at every stage<br> of projects></h2>
                        </div>

                    </a>

CSS:

.with-background{width:100%;background:url(https://cask.scotch.io/2015/04/scotch-box-sidebar.png);display:block;height:200px; position: absolute; }
.with-background:hover{opacity:0.7}
.bottom-align {position: absolute; }

I trust this demonstrates how to achieve the desired outcome :)

Answer 8

To achieve the desired effect, absolute positioning should be utilized. This will allow you to position the image behind the text without it being wrapped.

I have made changes to your fiddle as shown below:

<a href="#" class="col-xs-6 col-sm-4 big-container">
  <div class="with-background"></div>
    <div class="bottom-align">
                            <label class="uppercase">presentation</label>
                            <h2>A unified company<br> committed to<br> ensuring quality control<br> at every stage<br> of projects></h2>
                        </div>

                    </a>

CSS:

.with-background{width:100%;background:url(https://cask.scotch.io/2015/04/scotch-box-sidebar.png);display:block;height:200px; position: absolute; }
.with-background:hover{opacity:0.7}
.bottom-align {position: absolute; }

I trust this demonstrates how to achieve the desired outcome :)

Answer 9

Answer №5

Opacity can have an impact on how children perceive things, making it challenging to achieve your desired effect with opacity alone.

One possible solution is to incorporate a gradient with rgba into the background image. This creates an invisible overlay that becomes visible upon hover.

Invisible layer:

.with-gradient {
    background: linear-gradient(
        rgba(255, 255, 255, 0),
        rgba(255, 255, 255, 0)
    ),
    url('https://example.com/image.png');
}

Opacity applied on hover:

.with-gradient:hover {
    background: linear-gradient(
        rgba(255, 255, 255, 0.4),
        rgba(255, 255, 255, 0.4)
    ),
    url('https://example.com/image.png');
}

Check out the live example here - http://jsfiddle.net/5gnk28ah/1/

Answer 10

Opacity can have an impact on how children perceive things, making it challenging to achieve your desired effect with opacity alone.

One possible solution is to incorporate a gradient with rgba into the background image. This creates an invisible overlay that becomes visible upon hover.

Invisible layer:

.with-gradient {
    background: linear-gradient(
        rgba(255, 255, 255, 0),
        rgba(255, 255, 255, 0)
    ),
    url('https://example.com/image.png');
}

Opacity applied on hover:

.with-gradient:hover {
    background: linear-gradient(
        rgba(255, 255, 255, 0.4),
        rgba(255, 255, 255, 0.4)
    ),
    url('https://example.com/image.png');
}

Check out the live example here - http://jsfiddle.net/5gnk28ah/1/

Hover causing opacity problem in CSS

Answer №1

1) Adjust the opacity of the png background image and place it on a black background using Photoshop/GIMP:

2) Use two separate divs:

Using the ::after or ::before pseudo-elements:

Answer №2

Answer №3

Answer №4

Answer №5

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