55 lines
1.5 KiB
Markdown
55 lines
1.5 KiB
Markdown
---
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title: Hamburger Button
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tags: interactivity,beginner
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---
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Displays a hamburger menu which transitions to a cross on hover.
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- Use a `.hamburger-menu` container `div` which contains the top, bottom, and middle bars.
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- The container is set to be a flex container (`display: flex`) with `flex-direction` to be `column` and `flex-wrap` to be `wrap` (alternatively, you can set both properties by a shorthand `flex-flow: column wrap`).
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- Add distance between the bars using `justify-content: space-between`.
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- The animation has 3 parts: top and bottom bars transforming to 45 degree angles (`rotate(45deg)`), and the middle bar fading away by setting `opacity: 0`.
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- The `transform-origin` is set to `left` so the bars rotate around the left point.
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- Set `transition all 0.5s` so that both `transform` and `opacity` properties are animated for half a second.
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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-direction: column;
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flex-wrap: 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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