after defining in vuejs webpack document is not defined error

[imadarif]

var $ = require('jquery'); 
require("jquery-mousewheel")($);
 require('malihu-custom-scrollbar-plugin')($);

Error:
/node_modules/malihu-custom-scrollbar-plugin/jquery.mCustomScrollbar.js:51
_dlp=("https:"==document.location.protocol) ? "https:" : "http:", /* location protocol */
^ ReferenceError: document is not defined