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Bootstrap/scss/_carousel.scss
Mark Otto 663057d441
Feature: Add carousel fade option (#22958)
* Move helpful code comments

* Add .carousel-fade option to Sass

* Document example of the fade carousel

* more logical warning of the .active class on carousel items
2018-01-21 22:51:08 -08:00

236 lines
5.1 KiB
SCSS

// Notes on the classes:
//
// 1. The .carousel-item-left and .carousel-item-right is used to indicate where
// the active slide is heading.
// 2. .active.carousel-item is the current slide.
// 3. .active.carousel-item-left and .active.carousel-item-right is the current
// slide in it's in-transition state. Only one of these occur at a time.
// 4. .carousel-item-next.carousel-item-left and .carousel-item-prev.carousel-item-right
// is the upcoming slide in transition.
.carousel {
position: relative;
}
.carousel-inner {
position: relative;
width: 100%;
overflow: hidden;
}
.carousel-item {
position: relative;
display: none;
align-items: center;
width: 100%;
@include transition($carousel-transition);
backface-visibility: hidden;
perspective: 1000px;
}
.carousel-item.active,
.carousel-item-next,
.carousel-item-prev {
display: block;
}
.carousel-item-next,
.carousel-item-prev {
position: absolute;
top: 0;
}
.carousel-item-next.carousel-item-left,
.carousel-item-prev.carousel-item-right {
transform: translateX(0);
@supports (transform-style: preserve-3d) {
transform: translate3d(0, 0, 0);
}
}
.carousel-item-next,
.active.carousel-item-right {
transform: translateX(100%);
@supports (transform-style: preserve-3d) {
transform: translate3d(100%, 0, 0);
}
}
.carousel-item-prev,
.active.carousel-item-left {
transform: translateX(-100%);
@supports (transform-style: preserve-3d) {
transform: translate3d(-100%, 0, 0);
}
}
//
// Alternate transitions
//
.carousel-fade {
.carousel-item {
opacity: 0;
transition-duration: .6s;
transition-property: opacity;
}
.carousel-item.active,
.carousel-item-next.carousel-item-left,
.carousel-item-prev.carousel-item-right {
opacity: 1;
}
.active.carousel-item-left,
.active.carousel-item-right {
opacity: 0;
}
.carousel-item-next,
.carousel-item-prev,
.carousel-item.active,
.active.carousel-item-left,
.active.carousel-item-prev {
transform: translateX(0);
@supports (transform-style: preserve-3d) {
transform: translate3d(0, 0, 0);
}
}
}
//
// Left/right controls for nav
//
.carousel-control-prev,
.carousel-control-next {
position: absolute;
top: 0;
bottom: 0;
// Use flex for alignment (1-3)
display: flex; // 1. allow flex styles
align-items: center; // 2. vertically center contents
justify-content: center; // 3. horizontally center contents
width: $carousel-control-width;
color: $carousel-control-color;
text-align: center;
opacity: $carousel-control-opacity;
// We can't have a transition here because WebKit cancels the carousel
// animation if you trip this while in the middle of another animation.
// Hover/focus state
@include hover-focus {
color: $carousel-control-color;
text-decoration: none;
outline: 0;
opacity: .9;
}
}
.carousel-control-prev {
left: 0;
@if $enable-gradients {
background: linear-gradient(90deg, rgba(0, 0, 0, .25), rgba(0, 0, 0, .001));
}
}
.carousel-control-next {
right: 0;
@if $enable-gradients {
background: linear-gradient(270deg, rgba(0, 0, 0, .25), rgba(0, 0, 0, .001));
}
}
// Icons for within
.carousel-control-prev-icon,
.carousel-control-next-icon {
display: inline-block;
width: $carousel-control-icon-width;
height: $carousel-control-icon-width;
background: transparent no-repeat center center;
background-size: 100% 100%;
}
.carousel-control-prev-icon {
background-image: $carousel-control-prev-icon-bg;
}
.carousel-control-next-icon {
background-image: $carousel-control-next-icon-bg;
}
// Optional indicator pips
//
// Add an ordered list with the following class and add a list item for each
// slide your carousel holds.
.carousel-indicators {
position: absolute;
right: 0;
bottom: 10px;
left: 0;
z-index: 15;
display: flex;
justify-content: center;
padding-left: 0; // override <ol> default
// Use the .carousel-control's width as margin so we don't overlay those
margin-right: $carousel-control-width;
margin-left: $carousel-control-width;
list-style: none;
li {
position: relative;
flex: 0 1 auto;
width: $carousel-indicator-width;
height: $carousel-indicator-height;
margin-right: $carousel-indicator-spacer;
margin-left: $carousel-indicator-spacer;
text-indent: -999px;
background-color: rgba($carousel-indicator-active-bg, .5);
// Use pseudo classes to increase the hit area by 10px on top and bottom.
&::before {
position: absolute;
top: -10px;
left: 0;
display: inline-block;
width: 100%;
height: 10px;
content: "";
}
&::after {
position: absolute;
bottom: -10px;
left: 0;
display: inline-block;
width: 100%;
height: 10px;
content: "";
}
}
.active {
background-color: $carousel-indicator-active-bg;
}
}
// Optional captions
//
//
.carousel-caption {
position: absolute;
right: ((100% - $carousel-caption-width) / 2);
bottom: 20px;
left: ((100% - $carousel-caption-width) / 2);
z-index: 10;
padding-top: 20px;
padding-bottom: 20px;
color: $carousel-caption-color;
text-align: center;
}