[Vuejs]-TypeError: this.$cookies is undefined using vue-cookie

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You’re using this.$cookies outside the Vue context, where this is probably window.

To resolve the issue, replace this.$cookies with Vue.$cookies to set a global cookie, or move this.$cookies to a component method/hook.

Example usage based on the docs:

//...
Vue.use(VueCookies)

// set global cookie
Vue.$cookies.set('theme', 'default');

// set cookie from Vue context
new Vue({
  mounted() {
    this.$cookies.set('theme', 'default');
  }
})

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