GitLabDropdown.prototype.opened = function()

in app/assets/javascripts/gl_dropdown.js [588:635]
38 lines of code
13 McCabe index (conditional complexity)

  GitLabDropdown.prototype.opened = function(e) {
    var contentHtml;
    this.resetRows();
    this.addArrowKeyEvent();

    const dropdownToggle = this.dropdown.find('.dropdown-menu-toggle');
    const hasFilterBulkUpdate = dropdownToggle.hasClass('js-filter-bulk-update');
    const shouldRefreshOnOpen = dropdownToggle.hasClass('js-gl-dropdown-refresh-on-open');
    const hasMultiSelect = dropdownToggle.hasClass('js-multiselect');

    // Makes indeterminate items effective
    if (this.fullData && (shouldRefreshOnOpen || hasFilterBulkUpdate)) {
      this.parseData(this.fullData);
    }

    // Process the data to make sure rendered data
    // matches the correct layout
    const inputValue = this.filterInput.val();
    if (this.fullData && hasMultiSelect && this.options.processData && inputValue.length === 0) {
      this.options.processData.call(
        this.options,
        inputValue,
        this.filteredFullData(),
        this.parseData.bind(this),
      );
    }

    contentHtml = $('.dropdown-content', this.dropdown).html();
    if (this.remote && contentHtml === '') {
      this.remote.execute();
    } else {
      this.focusTextInput();
    }

    if (this.options.showMenuAbove) {
      this.positionMenuAbove();
    }

    if (this.options.opened) {
      if (this.options.preserveContext) {
        this.options.opened(e);
      } else {
        this.options.opened.call(this, e);
      }
    }

    return this.dropdown.trigger('shown.gl.dropdown');
  };