How to use jQuery

[farnetani]

I put in main.js:

import $ from 'jquery'

This made jquery work, but in a certain function of mine I'm having the following error:

Cannot read property 'document' of undefined

The error is in this part of the jquery code:

  if ( !w.document ) {
       throw new Error( "jQuery requires a window with a document" );

How to solve this?
I need to make jQuery work with Vuejs normally!