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window is not defined nuxt.js

how to fix the error?
nuxt.config.js

module.exports = {
  plugins: {
     '~plugins/fullpage-vue.js'
  },
build: {
    vendor: [
      'fullpage-vue'
    ]
   ...
}

fullpage-vue.js

import Vue from 'vue'
import VueFullpage from 'fullpage-vue'

if (process.BROWSER_BUILD) {
  Vue.use(VueFullpage)
}

So does not help. I get the error window is not defined node_modules \ fullpage-vue \ dist \ fullpage.js

_{This question is available on Nuxt.js community (#c1719)}