Material Flipside Button with animation
HTML
<div class="btn">
<div class="btn-back">
<p>Are you sure you want to do that?</p>
<button class="yes">Yes</button>
<button class="no">No</button>
</div>
<div class="btn-front">Erase my computer!</div>
</div>
SCSS
$transition-duration: 0.8s;
$transition-easing: cubic-bezier(0.230, 1.000, 0.320, 1.000);
$bounce-easing: cubic-bezier(0.175, 0.885, 0.320, 1.275);
$closed-width: 200px;
$closed-height: 80px;
$opened-width: 400px;
$opened-height: 160px;
@import url(http://fonts.googleapis.com/css?family=Roboto:400,700);
html, body {
width: 100%;
height: 100%;
margin: 0;
user-select: none;
}
body {
display: flex;
font-family: Roboto, "Helvetica Neue", sans-serif;
font-size: 18px;
perspective: 1000px;
background-color: #f5f5f5;
flex-direction: column;
justify-content: center;
align-items: center;
}
.description {
margin-top: 50px;
text-align: center;
color: #999;
transition: opacity 0.3s ease;
}
.description a {
color: #4A9DF6;
text-decoration: none;
}
.btn.is-open ~ .description {
opacity: 0;
}
.btn {
display: block;
position: relative;
width: $closed-width;
height: $closed-height;
transition: width $transition-duration $transition-easing,
height $transition-duration $transition-easing,
transform $transition-duration $bounce-easing;
transform-style: preserve-3d;
transform-origin: 50% 50%;
text-align: center;
}
.btn-front {
position: absolute;
display: block;
width: 100%;
height: 100%;
line-height: $closed-height;
background-color: #F44336;
color: #fff;
cursor: pointer;
backface-visibility: hidden;
-webkit-tap-highlight-color: rgba( 0, 0, 0, 0 );
transition: background 0.15s ease,
line-height $transition-duration $transition-easing;
}
.btn-front:hover {
background-color: lighten(#F44336, 10%);
}
.btn.is-open .btn-front {
pointer-events: none;
line-height: $opened-height;
}
.btn-back {
position: absolute;
width: 100%;
height: 100%;
background-color: #eee;
color: #222;
transform: translateZ(-2px) rotateX(180deg);
overflow: hidden;
transition: box-shadow $transition-duration ease;
}
.btn-back p {
margin-top: 27px;
margin-bottom: 25px;
}
.btn-back button {
padding: 12px 20px;
width: 30%;
margin: 0 5px;
background-color: transparent;
border: 0;
border-radius: 2px;
font-size: 1em;
cursor: pointer;
-webkit-appearance: none;
-webkit-tap-highlight-color: rgba( 0, 0, 0, 0 );
transition: background 0.15s ease;
&:focus {
outline: 0;
}
&.yes {
background-color: #2196F3;
color: #fff;
&:hover {
background-color: lighten(#2196F3, 10%);
}
}
&.no {
color: #2196F3;
&:hover {
background-color: #ddd;
}
}
}
.btn.is-open .btn-back {
box-shadow: 0 8px 25px rgba(0,0,0,0.4);
}
.btn[data-direction="left"] .btn-back,
.btn[data-direction="right"] .btn-back {
transform: translateZ(-2px) rotateY(180deg);
}
.btn.is-open {
width: $opened-width;
height: $opened-height;
}
.btn[data-direction="top"].is-open {
transform: rotateX(180deg);
}
.btn[data-direction="right"].is-open {
transform: rotateY(180deg);
}
.btn[data-direction="bottom"].is-open {
transform: rotateX(-180deg);
}
.btn[data-direction="left"].is-open {
transform: rotateY(-180deg);
}
JAVASCRIPT
var btn = document.querySelector( '.btn' );
var btnFront = btn.querySelector( '.btn-front' ),
btnYes = btn.querySelector( '.btn-back .yes' ),
btnNo = btn.querySelector( '.btn-back .no' );
btnFront.addEventListener( 'click', function( event ) {
var mx = event.clientX - btn.offsetLeft,
my = event.clientY - btn.offsetTop;
var w = btn.offsetWidth,
h = btn.offsetHeight;
var directions = [
{ id: 'top', x: w/2, y: 0 },
{ id: 'right', x: w, y: h/2 },
{ id: 'bottom', x: w/2, y: h },
{ id: 'left', x: 0, y: h/2 }
];
directions.sort( function( a, b ) {
return distance( mx, my, a.x, a.y ) - distance( mx, my, b.x, b.y );
} );
btn.setAttribute( 'data-direction', directions.shift().id );
btn.classList.add( 'is-open' );
} );
btnYes.addEventListener( 'click', function( event ) {
btn.classList.remove( 'is-open' );
} );
btnNo.addEventListener( 'click', function( event ) {
btn.classList.remove( 'is-open' );
} );
function distance( x1, y1, x2, y2 ) {
var dx = x1-x2;
var dy = y1-y2;
return Math.sqrt( dx*dx + dy*dy );
}
