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snippets/css/s/image-overlay-hover.md

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+---
+title: Image overlay on hover
+type: snippet
+language: css
+tags: [visual,animation]
+cover: architectural
+dateModified: 2021-10-11T18:44:51+03:00
+---
+
+Displays an image overlay effect on hover.
+
+- Use the `::before` and `::after` pseudo-elements for the top and bottom bars of the overlay respectively. Set their `opacity`, `transform` and `transition` to produce the desired effect.
+- Use the `<figcaption>` for the text of the overlay. Set `display: flex`, `flex-direction: column` and `justify-content: center` to center the text into the image.
+- Use the `:hover` pseudo-selector to update the `opacity` and `transform` of all the elements and display the overlay.
+
+```html
+<figure class="hover-img">
+  <img src="https://picsum.photos/id/200/440/320.jpg"/>
+  <figcaption>
+    <h3>Lorem <br/>Ipsum</h3>
+  </figcaption>
+</figure>
+```
+
+```css
+.hover-img {
+  background-color: #000;
+  color: #fff;
+  display: inline-block;
+  margin: 8px;
+  max-width: 320px;
+  min-width: 240px;
+  overflow: hidden;
+  position: relative;
+  text-align: center;
+  width: 100%;
+}
+
+.hover-img * {
+  box-sizing: border-box;
+  transition: all 0.45s ease;
+}
+
+.hover-img::before,
+.hover-img::after {
+  background-color: rgba(0, 0, 0, 0.5);
+  border-top: 32px solid rgba(0, 0, 0, 0.5);
+  border-bottom: 32px solid rgba(0, 0, 0, 0.5);
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  content: '';
+  transition: all 0.3s ease;
+  z-index: 1;
+  opacity: 0;
+  transform: scaleY(2);
+}
+
+.hover-img img {
+  vertical-align: top;
+  max-width: 100%;
+  backface-visibility: hidden;
+}
+
+.hover-img figcaption {
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  align-items: center;
+  z-index: 1;
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
+  line-height: 1.1em;
+  opacity: 0;
+  z-index: 2;
+  transition-delay: 0.1s;
+  font-size: 24px;
+  font-family: sans-serif;
+  font-weight: 400;
+  letter-spacing: 1px;
+  text-transform: uppercase;
+}
+
+.hover-img:hover::before,
+.hover-img:hover::after {
+  transform: scale(1);
+  opacity: 1;
+}
+
+.hover-img:hover > img {
+  opacity: 0.7;
+}
+
+.hover-img:hover figcaption {
+  opacity: 1;
+}
+```