server/aspnetapp/wwwroot/lib/swiper/src/components/parallax/parallax.js

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import $ from '../../utils/dom';
import Utils from '../../utils/utils';

const Parallax = {
  setTransform(el, progress) {
    const swiper = this;
    const { rtl } = swiper;

    const $el = $(el);
    const rtlFactor = rtl ? -1 : 1;

    const p = $el.attr('data-swiper-parallax') || '0';
    let x = $el.attr('data-swiper-parallax-x');
    let y = $el.attr('data-swiper-parallax-y');
    const scale = $el.attr('data-swiper-parallax-scale');
    const opacity = $el.attr('data-swiper-parallax-opacity');

    if (x || y) {
      x = x || '0';
      y = y || '0';
    } else if (swiper.isHorizontal()) {
      x = p;
      y = '0';
    } else {
      y = p;
      x = '0';
    }

    if ((x).indexOf('%') >= 0) {
      x = `${parseInt(x, 10) * progress * rtlFactor}%`;
    } else {
      x = `${x * progress * rtlFactor}px`;
    }
    if ((y).indexOf('%') >= 0) {
      y = `${parseInt(y, 10) * progress}%`;
    } else {
      y = `${y * progress}px`;
    }

    if (typeof opacity !== 'undefined' && opacity !== null) {
      const currentOpacity = opacity - ((opacity - 1) * (1 - Math.abs(progress)));
      $el[0].style.opacity = currentOpacity;
    }
    if (typeof scale === 'undefined' || scale === null) {
      $el.transform(`translate3d(${x}, ${y}, 0px)`);
    } else {
      const currentScale = scale - ((scale - 1) * (1 - Math.abs(progress)));
      $el.transform(`translate3d(${x}, ${y}, 0px) scale(${currentScale})`);
    }
  },
  setTranslate() {
    const swiper = this;
    const {
      $el, slides, progress, snapGrid,
    } = swiper;
    $el.children('[data-swiper-parallax], [data-swiper-parallax-x], [data-swiper-parallax-y], [data-swiper-parallax-opacity], [data-swiper-parallax-scale]')
      .each((index, el) => {
        swiper.parallax.setTransform(el, progress);
      });
    slides.each((slideIndex, slideEl) => {