72 lines
2.2 KiB
Markdown
72 lines
2.2 KiB
Markdown
### Overflow scroll gradient
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Adds a fading gradient to an overflowing element to better indicate there is more content to be scrolled.
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#### HTML
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```html
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<div class="overflow-scroll-gradient">
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<div class="overflow-scroll-gradient__scroller">
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Lorem ipsum dolor sit amet consectetur adipisicing elit. <br />
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Iure id exercitationem nulla qui repellat laborum vitae, <br />
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molestias tempora velit natus. Quas, assumenda nisi. <br />
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Quisquam enim qui iure, consequatur velit sit? <br />
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Lorem ipsum dolor sit amet consectetur adipisicing elit.<br />
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Iure id exercitationem nulla qui repellat laborum vitae, <br />
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molestias tempora velit natus. Quas, assumenda nisi. <br />
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Quisquam enim qui iure, consequatur velit sit?
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</div>
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</div>
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```
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#### CSS
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```css
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.overflow-scroll-gradient {
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position: relative;
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}
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.overflow-scroll-gradient::after {
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content: '';
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position: absolute;
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bottom: 0;
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width: 240px;
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height: 25px;
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background: linear-gradient(
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rgba(255, 255, 255, 0.001),
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white
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); /* transparent keyword is broken in Safari */
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pointer-events: none;
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}
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.overflow-scroll-gradient__scroller {
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overflow-y: scroll;
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background: white;
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width: 240px;
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height: 200px;
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padding: 15px;
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line-height: 1.2;
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}
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```
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#### Demo
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#### Explanation
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1. `position: relative` on the parent establishes a Cartesian positioning context for pseudo-elements.
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2. `::after` defines a pseudo element.
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3. `background-image: linear-gradient(...)` adds a linear gradient that fades from transparent to white
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(top to bottom).
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4. `position: absolute` takes the pseudo element out of the flow of the document and positions it in relation to the parent.
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5. `width: 240px` matches the size of the scrolling element (which is a child of the parent that has
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the pseudo element).
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6. `height: 25px` is the height of the fading gradient pseudo-element, which should be kept relatively small.
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7. `bottom: 0` positions the pseudo-element at the bottom of the parent.
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8. `pointer-events: none` specifies that the pseudo-element cannot be a target of mouse events, allowing text behind it to still be selectable/interactive.
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#### Browser support
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<span class="snippet__support-note">✅ No caveats.</span>
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- https://caniuse.com/#feat=css-gradients
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<!-- tags: visual -->
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