offside.css

/* @@name @@version @@date
* @@description
* @@repository.url
*
* by Andrea Carraro
* Available under the MIT license
*/

/* Off-canvas element CSS */
.offside {
    position: fixed; /* Does not play well with some old browsers (see: README) */
    width: 200px;
    height: 100%;
    top: 0;
    z-index: 9999;
    overflow: auto;
    -webkit-overflow-scrolling: touch; /* enables momentum scrolling in iOS overflow elements */
}

/* Left off-canvas elements default status: out of the page */
.offside,
.offside--left {
    left: -200px;
}

/* Right off-canvas elements default status: out of the page */
.offside--right {
    left: auto;
    right: -200px;
}

/*
 * Left off-canvas element is open:
 * - off-canvas element slides in
 * - container elements slides out
 */
.offside--left.is-open,
.offside-js--is-left .offside-sliding-element {
    -webkit-transform: translate3d(200px, 0, 0);
    -moz-transform: translate3d(200px, 0, 0);
    -ms-transform: translate3d(200px, 0, 0);
    -o-transform: translate3d(200px, 0, 0);
    transform: translate3d(200px, 0, 0);
}

/*
 * Right off-canvas element is open:
 * - off-canvas element slides in
 * - container elements slides out
 */
.offside--right.is-open,
.offside-js--is-right .offside-sliding-element {
    -webkit-transform: translate3d(-200px, 0, 0);
    -moz-transform: translate3d(-200px, 0, 0);
    -ms-transform: translate3d(-200px, 0, 0);
    -o-transform: translate3d(-200px, 0, 0);
    transform: translate3d(-200px, 0, 0);
}

/* Elements Transitions */
.offside-js--interact .offside,
.offside-js--interact .offside-sliding-element {
    -webkit-transition: -webkit-transform .2s cubic-bezier(.16, .68, .43, .99);
    -moz-transition: -moz-transform .2s cubic-bezier(.16, .68, .43, .99);
    -o-transition: -o-transform .2s cubic-bezier(.16, .68, .43, .99);
    transition: transform .2s cubic-bezier(.16, .68, .43, .99);
    
    /* improves performance issues on mobile*/
    -webkit-backface-visibility: hidden;
    -webkit-perspective: 1000;
}

/* Body overflow */
.offside-js--init {
    overflow-x: hidden;
}



/* Fallback movements for browser not supporting CSS 3d Transitions
----------------------------------------------- */

/* Modernizr false negative csstransforms3d fix, reset CSS 3d Transitions */
.no-csstransforms3d .offside {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.no-csstransforms3d .offside-sliding-element {
    overflow-x: hidden;
    position: relative;
}

/* Element is open: off-canvas element slides in */
.no-csstransforms3d .offside--left.is-open {
    left: 0;
}

.no-csstransforms3d .offside--right.is-open {
    right: 0;
}

/* Element is open: container elements slide out */
.no-csstransforms3d > .offside-js--is-left .offside-sliding-element {
    right: -200px;
}

.no-csstransforms3d > .offside-js--is-right .offside-sliding-element {
    left: -200px;
}