Code for the littler Buttons the Computer used in the Turing Machine portion of the book.
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buttons-computer/sass/_comparison-sliders.scss

115 lines
1.9 KiB

// Image comparison slider
// Credit: http://codepen.io/solipsistacp/pen/Gpmaq
.comparison-slider {
height: 50vh;
overflow: hidden;
position: relative;
width: 100%;
-webkit-overflow-scrolling: touch;
.comparison-before,
.comparison-after {
height: 100%;
left: 0;
margin: 0;
overflow: hidden;
position: absolute;
top: 0;
img {
height: 100%;
object-fit: cover;
object-position: left center;
position: absolute;
width: 100%;
}
}
.comparison-before {
width: 100%;
z-index: 1;
.comparison-label {
right: $unit-4;
}
}
.comparison-after {
max-width: 100%;
min-width: 0;
z-index: 2;
&::before {
background: transparent;
content: "";
cursor: default;
height: 100%;
left: 0;
position: absolute;
right: $unit-4;
top: 0;
z-index: $zindex-0;
}
&::after {
background: currentColor;
border-radius: 50%;
box-shadow: 0 -5px, 0 5px;
color: $light-color;
content: "";
height: 3px;
position: absolute;
right: $unit-2;
top: 50%;
transform: translate(50%, -50%);
width: 3px;
}
.comparison-label {
left: $unit-4;
}
}
.comparison-resizer {
animation: first-run 1.5s 1 ease-in-out;
cursor: ew-resize;
height: $unit-4;
left: 0;
max-width: 100%;
min-width: $unit-4;
opacity: 0;
outline: none;
position: relative;
resize: horizontal;
top: 50%;
transform: translateY(-50%) scaleY(30);
width: 0;
}
.comparison-label {
background: rgba($dark-color, .5);
bottom: $unit-4;
color: $light-color;
padding: $unit-1 $unit-2;
position: absolute;
user-select: none;
}
}
@keyframes first-run {
0% {
width: 0;
}
25% {
width: $unit-12;
}
50% {
width: $unit-4;
}
75% {
width: $unit-6;
}
100% {
width: 0;
}
}