event.preventDefault() // work around Firefox bug #1540995\n        return\n      }\n\n      Button._jQueryInterface.call($(button), 'toggle')\n    }\n  })\n  .on(Event.FOCUS_BLUR_DATA_API, Selector.DATA_TOGGLE_CARROT, (event) => {\n    const button = $(event.target).closest(Selector.BUTTON)[0]\n    $(button).toggleClass(ClassName.FOCUS, /^focus(in)?$/.test(event.type))\n  })\n\n$(window).on(Event.LOAD_DATA_API, () => {\n  // ensure correct active class is set to match the controls' actual values/states\n\n...

ClassName = {\n  ACTIVE : 'active',\n  BUTTON : 'btn',\n  FOCUS  : 'focus'\n}\n\nconst Selector = {\n  DATA_TOGGLE_CARROT : '[data-toggle^=\"button\"]',\n  DATA_TOGGLE        : '[data-toggle=\"buttons\"]',\n  INPUT              : 'input:not([type=\"hidden\"])',\n  ACTIVE             : '.active',\n  BUTTON             : '.btn'\n}\n\nconst Event = {\n  CLICK_DATA_API      : `click${EVENT_KEY}${DATA_API_KEY}`,\n  FOCUS_BLUR_DATA_API : `focus${EVENT_KEY}${DATA_API_KEY} ` +\n                         ...