swiper/src/components/core/check-overflow/index.js

Most modern mobile touch slider and framework with hardware accelerated transitions

function checkOverflow() {
  const swiper = this;
  const wasLocked = swiper.isLocked;

  swiper.isLocked = swiper.snapGrid.length === 1;
  swiper.allowSlideNext = !swiper.isLocked;
  swiper.allowSlidePrev = !swiper.isLocked;

  // events
  if (wasLocked !== swiper.isLocked) swiper.emit(swiper.isLocked ? 'lock' : 'unlock');

  if (wasLocked && wasLocked !== swiper.isLocked) {
    swiper.isEnd = false;
    swiper.navigation.update();
  }
}

export default { checkOverflow };