美味的CSS动画汉堡包:hamburgers
Hamburgers
Hamburgers is a collection of tasty CSS-animated hamburger icons. Also included is the source as a Sass library. It’s modular and customizable, so cook up your own hamburger.
Table of Contents
Usage
Download and include the CSS in the
<head>
of your site:<link href="dist/hamburgers.css" rel="stylesheet">
Add the base hamburger markup:
<button class="hamburger" type="button"> <span class="hamburger-box"> <span class="hamburger-inner"></span> </span> </button>
You can use
<div>
s if you insist, but they’re not accessible as a menu button.<div class="hamburger" type="button"> <div class="hamburger-box"> <div class="hamburger-inner"></div> </div> </div>
Append the class name of the type of hamburger you’re craving:
<button class="hamburger hamburger--collapse" type="button"> <span class="hamburger-box"> <span class="hamburger-inner"></span> </span> </button>
Here’s the list of hamburger-type classes you can choose from:
hamburger--arrow hamburger--arrow-r hamburger--arrowalt hamburger--arrowalt-r hamburger--boring hamburger--collapse hamburger--collapse-r hamburger--elastic hamburger--elastic-r hamburger--emphatic hamburger--emphatic-r hamburger--slider hamburger--slider-r hamburger--spin hamburger--spin-r hamburger--squeeze hamburger--vortex hamburger--vortex-r
Note:
-r
classes are reverse variants (e.g.hamburger--spin
spins clockwise whereashamburger--spin-r
spins counterclockwise.Trigger the active state by appending class name
is-active
:<button class="hamburger hamburger--collapse is-active" type="button"> <span class="hamburger-box"> <span class="hamburger-inner"></span> </span> </button>
Since the class name would have to be toggled via JavaScript and implementation would differ based on the context of how you plan on using the hamburger, I’m going to leave the rest up to you.
Sass
I’ve also included .scss
source files if you use Sass as your CSS precompiler. It’s customizable and modular.
- Download and unzip the source files.
- Copy the files from the
_sass/hamburgers
directory into your project. Import the
hamburgers.scss
file in your Sass manifest file:@import "path/to/hamburgers";
Customize your hamburger and/or remove any types you don’t want in
hamburgers.scss
.- Compile your Sass*, and voila!
Hamburgers is also available on npm and Bower.
npm install hamburgers bower install css-hamburgers
* Be sure to run the CSS through Autoprefixer since the Sass doesn’t account for vendor prefixes.
Customization
Here is the full list of default settings (found in _sass/hamburgers/hamburgers.scss
);
$hamburger-padding-x : 15px !default; $hamburger-padding-y : 15px !default; $hamburger-layer-width : 40px !default; $hamburger-layer-height : 4px !default; $hamburger-layer-spacing : 6px !default; $hamburger-layer-color : #000 !default; $hamburger-layer-border-radius : 4px !default; $hamburger-hover-opacity : 0.7 !default; $hamburger-hover-transition-duration : 0.15s !default; $hamburger-hover-transition-timing-function: linear !default; // To use CSS filters as the hover effect instead of opacity, // set $hamburger-hover-use-filter as true and // change the value of $hamburger-hover-filter accordingly. $hamburger-hover-use-filter: false !default; $hamburger-hover-filter : opacity(50%) !default;
To override any default settings, you can change the value(s) within hamburgers.scss
, but I recommend you declare your new settings separately:
@import "path/to/hamburgers"; $hamburgers-padding-x: 20px; $hamburgers-padding-y: 15px;
You can also create a separate file (e.g. hamburgers-settings.scss
) with those declarations, then import it along with Hamburgers:
@import "path/to/hamburgers"; @import "hamburgers-settings"
ems
or rems
Wanna work with ems
or rems
instead of px
? Just change all the px
values to the unit of your choice. Note: Be consistent (all px
or all ems
), otherwise it may break—the math behind the customization will fail if it attempts to perform operations with values of different units.
Not satisfied?
Dig into _base.scss
or types/
and customize to your heart’s content. Fair warning: It‘s pretty delicate and may break, especially if you tweak the animations themselves.
Accessibility
Hamburger menu icons can be useful in the right context, but they’re not the most accessible.
ARIA will help make it accessible to people with disabilities.
<button class="hamburger hamburger--elastic" type="button" aria-label="Menu" aria-controls="navigation"> <span class="hamburger-box"> <span class="hamburger-inner"></span> </span> </button> <nav id="navigation"> <!--navigation goes here--> </nav>
If you insist on using <div>
s, by default they’re not focusable (i.e. via keyboard or assistive technology). Add the tabindex
attribute alongside ARIA.
<div class="hamburger hamburger--elastic" tabindex="0" aria-label="Menu" role="button" aria-controls="navigation"> <div class="hamburger-box"> <div class="hamburger-inner"></div> </div> </div> <nav id="navigation"> <!--navigation goes here--> </nav>
A label can help make it more obvious that it toggles a menu.
<button class="hamburger hamburger--collapse" type="button"> <span class="hamburger-box"> <span class="hamburger-inner"></span> </span> <span class="hamburger-label">Menu</span> </button>
Here are some resources on web accessibility and ARIA.
Browser Support
Animations use CSS3 3D transforms (translate3d
whenever possible for GPU acceleration), which is supported by most browsers (not supported by IE9 and older and Opera Mini). For detailed browser support, check caniuse.com.