Using with SSR. Error "ReferenceError: window is not defined"

[abratko]

My project use SSR.
I install vue-circle-progress but don`t use component any where.
I get error "ReferenceError: window is not defined"

It can be fixed easily. Just replace

var $ = require('jquery-easing');

to

const $ = typeof window !== 'undefined' ? require('jquery-easing') : null