initConstants () {
    super.initConstants()

    this.constants.classes.buttonsGroup = 'button-group'
    this.constants.classes.buttonsDropdown = 'dropdown-container'
    this.constants.classes.paginationDropdown = ''
    this.constants.classes.dropdownActive = 'is-active'
    this.constants.classes.paginationActive = 'current'
    this.constants.classes.buttonActive = 'success'

    this.constants.html.toolbarDropdown = ['<div class="dropdown-pane" data-dropdown><ul class="vertical menu">', '</ul></div>']
    this.constants.html.toolbarDropdownItem = '<li class="dropdown-item-marker"><label class="dropdown-item">%s</label></li>'
    this.constants.html.toolbarDropdownSeparator = '<li><hr></li>'
    this.constants.html.pageDropdown = ['<div class="dropdown-pane" id="pagination-list-id" data-dropdown><ul class="vertical menu">', '</ul></div>']
    this.constants.html.pageDropdownItem = '<li class="dropdown-item %s"><a href="#">%s</a></li>'
    this.constants.html.dropdownCaret = '<i class="fa fa-angle-down"></i>'
    this.constants.html.pagination = ['<ul class="pagination%s">', '</ul>']
    this.constants.html.paginationItem = '<li><a class="page-item%s" aria-label="%s" href="#">%s</a></li>'
    this.constants.html.inputGroup = '<div class="input-group">%s <div class="input-group-button">%s</div></div>'
    this.constants.html.searchInput = '<input class="%s input-%s input-group-field" type="search" placeholder="%s">'
  }
@author zhixin wen <wenzhixin2010@gmail.com>
https://github.com/wenzhixin/bootstrap-table/
theme: https://github.com/zurb/foundation-sites