57 lines
1.3 KiB
Markdown
57 lines
1.3 KiB
Markdown
---
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title: Hamburger Button
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tags: interactivity
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expertise: intermediate
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cover: blog_images/volcano-sunset.jpg
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firstSeen: 2019-10-10T03:49:38+03:00
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lastUpdated: 2020-12-30T15:37:37+02:00
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---
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Displays a hamburger menu which transitions to a cross button on hover.
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- Use a `.hamburger-menu` container `div` which contains the top, bottom, and middle bars.
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- Set the container to `display: flex` with `flex-flow: column wrap`.
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- Add distance between the bars using `justify-content: space-between`.
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- Use `transform: rotate()` to rotate the top and bottom bars by 45 degrees and `opacity: 0` to fade the middle bar on hover.
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- Use `transform-origin: left` so that the bars rotate around the left point.
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```html
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<div class="hamburger-menu">
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<div class="bar top"></div>
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<div class="bar middle"></div>
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<div class="bar bottom"></div>
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</div>
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```
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```css
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.hamburger-menu {
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display: flex;
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flex-flow: column wrap;
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justify-content: space-between;
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height: 2.5rem;
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width: 2.5rem;
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cursor: pointer;
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}
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.hamburger-menu .bar {
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height: 5px;
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background: black;
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border-radius: 5px;
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margin: 3px 0px;
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transform-origin: left;
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transition: all 0.5s;
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}
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.hamburger-menu:hover .top {
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transform: rotate(45deg);
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}
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.hamburger-menu:hover .middle {
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opacity: 0;
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}
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.hamburger-menu:hover .bottom {
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transform: rotate(-45deg);
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}
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```
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