Expected behavior

Should work in Edge according to the chart of listed browsers

Actual behavior

Console error from this function listed in question title (placeDropdown(eventType))

Resources (screenshots, code snippets etc.)

...options is causing SCRIPT1028: SCRIPT1028: Expected identifier, string or number

function placeDropdown(eventType) {
    // Check for simultaneous focus and click events.
    if (eventType === 'focus') {
      isFocused = true;
    } // Check html data attributes


    updateOptions(); // Set Dropdown state

    activates.addClass('active');
    origin.addClass('active'); // Constrain width

    if (options.constrain_width === true) {
      activates.css('width', origin.outerWidth());
    } else {
      activates.css('white-space', 'nowrap');
    }

    updatePosition(origin, activates); // Show dropdown

    activates.stop(true, true).css('opacity', 0).slideDown({
      queue: false,
      duration: options.inDuration,
      easing: 'easeOutCubic',

      complete() {
        $(this).css('height', '');
      }

    }).animate({
      opacity: 1,
  ...(options.resetScroll && {
        scrollTop: 0
      })
    }, {
      queue: false,
      duration: options.inDuration,
      easing: 'easeOutSine'
    });
  }