swiper/src/components/core/update/updateClickedSlide.js

Most modern mobile touch slider and framework with hardware accelerated transitions

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

export default function (e) {
  const swiper = this;
  const params = swiper.params;
  const slide = $(e.target).closest(`.${params.slideClass}`)[0];
  let slideFound = false;
  if (slide) {
    for (let i = 0; i < swiper.slides.length; i += 1) {
      if (swiper.slides[i] === slide) slideFound = true;
    }
  }

  if (slide && slideFound) {
    swiper.clickedSlide = slide;
    if (swiper.virtual && swiper.params.virtual.enabled) {
      swiper.clickedIndex = parseInt($(slide).attr('data-swiper-slide-index'), 10);
    } else {
      swiper.clickedIndex = $(slide).index();
    }
  } else {
    swiper.clickedSlide = undefined;
    swiper.clickedIndex = undefined;
    return;
  }
  if (params.slideToClickedSlide && swiper.clickedIndex !== undefined && swiper.clickedIndex !== swiper.activeIndex) {
    swiper.slideToClickedSlide();
  }
}