swiper/src/components/core/translate/translateTo.js

Most modern mobile touch slider and framework with hardware accelerated transitions

export default function (translate = 0, speed = this.params.speed, runCallbacks = true, translateBounds = true, internal) {
  const swiper = this;

  const {
    params,
    wrapperEl,
  } = swiper;

  if (swiper.animating && params.preventInteractionOnTransition) {
    return false;
  }

  const minTranslate = swiper.minTranslate();
  const maxTranslate = swiper.maxTranslate();
  let newTranslate;
  if (translateBounds && translate > minTranslate) newTranslate = minTranslate;
  else if (translateBounds && translate < maxTranslate) newTranslate = maxTranslate;
  else newTranslate = translate;

  // Update progress
  swiper.updateProgress(newTranslate);

  if (params.cssMode) {
    const isH = swiper.isHorizontal();
    if (speed === 0) {
      wrapperEl[isH ? 'scrollLeft' : 'scrollTop'] = -newTranslate;
    } else {
      // eslint-disable-next-line
      if (wrapperEl.scrollTo) {
        wrapperEl.scrollTo({
          [isH ? 'left' : 'top']: -newTranslate,
          behavior: 'smooth',
        });
      } else {
        wrapperEl[isH ? 'scrollLeft' : 'scrollTop'] = -newTranslate;
      }
    }
    return true;
  }

  if (speed === 0) {
    swiper.setTransition(0);
    swiper.setTranslate(newTranslate);
    if (runCallbacks) {
      swiper.emit('beforeTransitionStart', speed, internal);
      swiper.emit('transitionEnd');
    }
  } else {
    swiper.setTransition(speed);
    swiper.setTranslate(newTranslate);
    if (runCallbacks) {
      swiper.emit('beforeTransitionStart', speed, internal);
      swiper.emit('transitionStart');
    }
    if (!swiper.animating) {
      swiper.animating = true;
      if (!swiper.onTranslateToWrapperTransitionEnd) {
        swiper.onTranslateToWrapperTransitionEnd = function transitionEnd(e) {
          if (!swiper || swiper.destroyed) return;
          if (e.target !== this) return;
          swiper.$wrapperEl[0].removeEventListener('transitionend', swiper.onTranslateToWrapperTransitionEnd);
          swiper.$wrapperEl[0].removeEventListener('webkitTransitionEnd', swiper.onTranslateToWrapperTransitionEnd);
          swiper.onTranslateToWrapperTransitionEnd = null;
          delete swiper.onTranslateToWrapperTransitionEnd;
          if (runCallbacks) {
            swiper.emit('transitionEnd');
          }
        };
      }
      swiper.$wrapperEl[0].addEventListener('transitionend', swiper.onTranslateToWrapperTransitionEnd);
      swiper.$wrapperEl[0].addEventListener('webkitTransitionEnd', swiper.onTranslateToWrapperTransitionEnd);
    }
  }

  return true;
}