slidesOffsetBefore as percentage value

[Markao17]

I'm trying to use slidesOffsetBefore as a percentage value, cause i have percentage based slides width with loop and slidesPerView: 'auto' and i need to show part of the previous slider.

my code:

var sliderVideo = new Swiper('.swiper-container', {
  slidesPerView: 'auto',
  centeredSlides: true,
  spaceBetween: 30,
  slidesOffsetBefore: '10%',
  loopedSlides: 5,
  grabCursor: true,
  loop: true,
  navigation: {
    nextEl: '.video-slider__next',
    prevEl: '.video-slider__prev',
  },
  breakpoints: {
    // when window width is <= 759px
    759: {
      slidesOffsetBefore: 0,
    }
  }
});

Tried a lot of values and it rests on the left of container. If i set it to 0, it shows a bit of previous slider due to centeredSlides, but not the result i'm looking for.
Can't get it to work and can't find anything about it.

Thanks in advance

[Markao17]

Well after some tries, and for someone who lands here my solution for now was to pass a function to make that calculations. Here's my code:

var sliderVideo = new Swiper('.slider' {
  slidesPerView: 'auto',
  centeredSlides: true,
  spaceBetween: 30,
  slidesOffsetBefore: 0,
  loopedSlides: 5,
  grabCursor: true,
  loop: true,
  navigation: {
    nextEl: '.slider__next',
    prevEl: '.slider__prev',
  },
  breakpoints: {
    // when window width is <= 759px
    759: {
      slidesOffsetBefore: 0,
    }
  }
});

$('.slider').each(function() {
  var sliderWidth = $(this).width();
  var sliderOffset = - (sliderWidth * 21) / 100;
  sliderVideo.params.slidesOffsetBefore = sliderOffset;
  sliderVideo.update();
});

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