effect-cards.js
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import effectInit from '../../shared/effect-init.js';
import effectTarget from '../../shared/effect-target.js';
import effectVirtualTransitionEnd from '../../shared/effect-virtual-transition-end.js';
export default function EffectCards({
swiper,
extendParams,
on
}) {
extendParams({
cardsEffect: {
slideShadows: true,
transformEl: null,
rotate: true,
perSlideRotate: 2,
perSlideOffset: 8,
},
});
const setTranslate = () => {
const {
slides,
activeIndex
} = swiper;
const params = swiper.params.cardsEffect;
const {
startTranslate,
isTouched
} = swiper.touchEventsData;
const currentTranslate = swiper.translate;
for (let i = 0; i < slides.length; i += 1) {
const $slideEl = slides[i];
const slideProgress = $slideEl.progress;
const progress = Math.min(Math.max(slideProgress, -4), 4);
let offset = $slideEl.swiperSlideOffset;
if (swiper.params.centeredSlides && !swiper.params.cssMode) {
swiper.$wrapperEl.transform(`translateX(${swiper.minTranslate()}px)`);
}
if (swiper.params.centeredSlides && swiper.params.cssMode) {
offset -= slides.swiperSlideOffset;
}
let tX = swiper.params.cssMode ? -offset - swiper.translate : -offset;
let tY = 0;
const tZ = -100 * Math.abs(progress);
let scale = 1;
let rotate = -params.perSlideRotate * progress;
let tXAdd = params.perSlideOffset - Math.abs(progress) * 0.75;
const isSwipeToNext =
(i === activeIndex || i === activeIndex - 1) &&
progress > 0 &&
progress < 1 &&
(isTouched || swiper.params.cssMode) &&
currentTranslate < startTranslate;
const isSwipeToPrev =
(i === activeIndex || i === activeIndex + 1) &&
progress < 0 &&
progress > -1 &&
(isTouched || swiper.params.cssMode) &&
currentTranslate > startTranslate;
if (isSwipeToNext || isSwipeToPrev) {
const subProgress = (1 - Math.abs((Math.abs(progress) - 0.5) / 0.5)) ** 0.5;
rotate += -28 * progress * subProgress;
scale += -0.5 * subProgress;
tXAdd += 96 * subProgress;
tY = `${-25 * subProgress * Math.abs(progress)}%`;
}
if (progress < 0) {
// next
tX = `calc(${tX}px + (${tXAdd * Math.abs(progress)}%))`;
} else if (progress > 0) {
// prev
tX = `calc(${tX}px + (-${tXAdd * Math.abs(progress)}%))`;
} else {
tX = `${tX}px`;
}
if (!swiper.isHorizontal()) {
const prevY = tY;
tY = tX;
tX = prevY;
}
const scaleString =
progress < 0 ? `${1 + (1 - scale) * progress}` : `${1 - (1 - scale) * progress}`;
const transform =
`translate3d(${tX}, ${tY}, ${tZ}px) rotateZ(${params.rotate ? rotate : 0}deg) scale(${scaleString})`;
$slideEl.css({
zIndex: -Math.abs(Math.round(slideProgress)) + slides.length
})
const $targetEl = effectTarget(params, $slideEl);
$targetEl.transform(transform);
if (swiper.params.willChange) {
$targetEl.willChange("transform");
}
slides[i].addClass('swiper-slide-cards')
}
};
const setTransition = (duration) => {
const {
transformEl
} = swiper.params.cardsEffect;
const $transitionElements = transformEl ? swiper.slides.find(transformEl) : swiper.slides;
for (let i = 0; i < $transitionElements.length; i += 1) {
$transitionElements[i].transition(duration);
}
effectVirtualTransitionEnd({
swiper,
duration,
transformEl
});
};
effectInit({
effect: 'cards',
swiper,
on,
setTranslate,
setTransition,
perspective: () => true,
overwriteParams: () => ({
watchSlidesProgress: true,
virtualTranslate: !swiper.params.cssMode,
}),
});
}