$(parent).trigger(showEvent)\n\n    if (showEvent.isDefaultPrevented()) {\n      return\n    }\n\n    // Disable totally Popper.js for Dropdown in Navbar\n    if (!this._inNavbar) {\n      /**\n       * Check for Popper dependency\n       * Popper - https://popper.js.org\n       */\n      if (typeof Popper === 'undefined') {\n        throw new TypeError('Bootstrap\\'s dropdowns require Popper.js (https://popper.js.org/)')\n      }\n\n      let referenceElement = this._element\n\n      if (this._config.reference ===...

ent)\n\n    if (showEvent.isDefaultPrevented()) {\n      return\n    }\n\n    // Disable totally Popper.js for Dropdown in Navbar\n    if (!this._inNavbar && usePopper) {\n      /**\n       * Check for Popper dependency\n       * Popper - https://popper.js.org\n       */\n      if (typeof Popper === 'undefined') {\n        throw new TypeError('Bootstrap\\'s dropdowns require Popper.js (https://popper.js.org/)')\n      }\n\n      let referenceElement = this._element\n\n      if (this._config.reference...

reference and popper elements (allow jQuery wrappers)\n    this.reference = reference && reference.jquery ? reference[0] : reference;\n    this.popper = popper && popper.jquery ? popper[0] : popper;\n\n    // Deep merge modifiers options\n    this.options.modifiers = {};\n    Object.keys({\n      ...Popper.Defaults.modifiers,\n      ...options.modifiers,\n    }).forEach(name => {\n      this.options.modifiers[name] = {\n        // If it's a built-in modifier, use it as base\n        ...(Popper.Defaults.modifiers[name]...