Function getRect

modular/sortable.core.esm.js:249–312

* Returns the "bounding client rect" of given element * @param {HTMLElement} el The element whose boundingClientRect is wanted * @param {[Boolean]} relativeToContainingBlock Whether the rect should be relative to the containing block of (including) the container * @param

(el, relativeToContainingBlock, relativeToNonStaticParent, undoScale, container)

 * @return {Object}                               The boundingClientRect of el, with specified adjustments
 */
function getRect(el, relativeToContainingBlock, relativeToNonStaticParent, undoScale, container) {
  if (!el.getBoundingClientRect && el !== window) return;
  var elRect, top, left, bottom, right, height, width;
  if (el !== window && el.parentNode && el !== getWindowScrollingElement()) {
    elRect = el.getBoundingClientRect();
    top = elRect.top;
    left = elRect.left;
    bottom = elRect.bottom;
    right = elRect.right;
    height = elRect.height;
    width = elRect.width;
  } else {
    top = 0;
    left = 0;
    bottom = window.innerHeight;
    right = window.innerWidth;
    height = window.innerHeight;
    width = window.innerWidth;
  }
  if ((relativeToContainingBlock || relativeToNonStaticParent) && el !== window) {
    // Adjust for translate()
    container = container || el.parentNode;

    // solves #1123 (see: https://stackoverflow.com/a/37953806/6088312)
    // Not needed on <= IE11
    if (!IE11OrLess) {
      do {
        if (container && container.getBoundingClientRect && (css(container, 'transform') !== 'none' || relativeToNonStaticParent && css(container, 'position') !== 'static')) {
          var containerRect = container.getBoundingClientRect();

          // Set relative to edges of padding box of container
          top -= containerRect.top + parseInt(css(container, 'border-top-width'));
          left -= containerRect.left + parseInt(css(container, 'border-left-width'));
          bottom = top + elRect.height;
          right = left + elRect.width;
          break;
        }
        /* jshint boss:true */
      } while (container = container.parentNode);
    }
  }
  if (undoScale && el !== window) {
    // Adjust for scale()
    var elMatrix = matrix(container || el),
      scaleX = elMatrix && elMatrix.a,
      scaleY = elMatrix && elMatrix.d;
    if (elMatrix) {
      top /= scaleY;
      left /= scaleX;
      width /= scaleX;
      height /= scaleY;
      bottom = top + height;
      right = left + width;
    }
  }
  return {
    top: top,
    left: left,