How to Add a Black Transparent Overlay with Text to Images on Hover Using CSS?

Adding a Black Transparent Overlay to Images on Hover Using CSS

Creating a black transparent overlay on an image upon hover is achievable using CSS. Here's a comprehensive guide to accomplish this:

Using a Pseudo Element

To avoid the issue with overlay elements on enclosed img elements, you can insert a pseudo element in its place. Wrap the img element as such:

<div class="image">
  <img src="image.jpg" alt="" />
</div>

Configure the CSS:

.image {
  position: relative;
  width: 400px;
  height: 400px;
}
.image img {
  width: 100%;
  vertical-align: top;
}
.image:after {
  content: '\A';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  opacity: 0;
  transition: all 1s;
}
.image:hover:after {
  opacity: 1;
}

Adding Text on Hover

For simplicity, include text as the pseudo element's content value:

.image:after {
  content: 'Your Text';
  color: #fff;
}

Alternatively, set the text in a data-* attribute for unique text display:

.image:after {
  content: attr(data-content);
  color: #fff;
}

<div data-content="Text to Display" class="image">
  <img src="image.jpg" alt="" />
</div>

Combining Overlay and Text

Separate styling allows for independent positioning of elements:

.image:after, .image:before {
  position: absolute;
  opacity: 0;
  transition: all 0.5s;
}
.image:after {
  content: '\A';
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.6);
}
.image:before {
  content: attr(data-content);
  width: 100%;
  color: #fff;
  z-index: 1;
  bottom: 0;
  padding: 4px 10px;
  text-align: center;
  background: #f00;
  box-sizing: border-box;
}
.image:hover:after, .image:hover:before {
  opacity: 1;
}

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