swiper/core/update/updateSize.js

Most modern mobile touch slider and framework with hardware accelerated transitions

import { elementStyle } from '../../shared/utils.js';
export default function updateSize() {
  const swiper = this;
  let width;
  let height;
  const el = swiper.el;
  if (typeof swiper.params.width !== 'undefined' && swiper.params.width !== null) {
    width = swiper.params.width;
  } else {
    width = el.clientWidth;
  }
  if (typeof swiper.params.height !== 'undefined' && swiper.params.height !== null) {
    height = swiper.params.height;
  } else {
    height = el.clientHeight;
  }
  if (width === 0 && swiper.isHorizontal() || height === 0 && swiper.isVertical()) {
    return;
  }

  // Subtract paddings
  width = width - parseInt(elementStyle(el, 'padding-left') || 0, 10) - parseInt(elementStyle(el, 'padding-right') || 0, 10);
  height = height - parseInt(elementStyle(el, 'padding-top') || 0, 10) - parseInt(elementStyle(el, 'padding-bottom') || 0, 10);
  if (Number.isNaN(width)) width = 0;
  if (Number.isNaN(height)) height = 0;
  Object.assign(swiper, {
    width,
    height,
    size: swiper.isHorizontal() ? width : height
  });
}