module.exports = function()

in slides/custom/asset/common/perfect-scrollbar/0.6.8/js/perfect-scrollbar.js [1471:1544]

• 58 lines of code
• 24 McCabe index (conditional complexity)

module.exports = function (element, axis, value) {
  if (typeof element === 'undefined') {
    throw 'You must provide an element to the update-scroll function';
  }

  if (typeof axis === 'undefined') {
    throw 'You must provide an axis to the update-scroll function';
  }

  if (typeof value === 'undefined') {
    throw 'You must provide a value to the update-scroll function';
  }

  if (axis === 'top' && value <= 0) {
    element.scrollTop = 0;
    element.dispatchEvent(yStartEvent);
    return; // don't allow negative scroll
  }

  if (axis === 'left' && value <= 0) {
    element.scrollLeft = 0;
    element.dispatchEvent(xStartEvent);
    return; // don't allow negative scroll
  }

  var i = instances.get(element);

  if (axis === 'top' && value >= i.contentHeight - i.containerHeight) {
    element.scrollTop = i.contentHeight - i.containerHeight;
    element.dispatchEvent(yEndEvent);
    return; // don't allow scroll past container
  }

  if (axis === 'left' && value >= i.contentWidth - i.containerWidth) {
    element.scrollLeft = i.contentWidth - i.containerWidth;
    element.dispatchEvent(xEndEvent);
    return; // don't allow scroll past container
  }

  if (!lastTop) {
    lastTop = element.scrollTop;
  }

  if (!lastLeft) {
    lastLeft = element.scrollLeft;
  }

  if (axis === 'top' && value < lastTop) {
    element.dispatchEvent(upEvent);
  }

  if (axis === 'top' && value > lastTop) {
    element.dispatchEvent(downEvent);
  }

  if (axis === 'left' && value < lastLeft) {
    element.dispatchEvent(leftEvent);
  }

  if (axis === 'left' && value > lastLeft) {
    element.dispatchEvent(rightEvent);
  }

  if (axis === 'top') {
    element.scrollTop = lastTop = value;
    element.dispatchEvent(yEvent);
  }

  if (axis === 'left') {
    element.scrollLeft = lastLeft = value;
    element.dispatchEvent(xEvent);
  }

};