LocalStorage is not defined?

Question

Vue.js

I use the nuxt js framework, when using the localstorage object, it gives out undefined ... I read why this happens, they say that you need to set the proccess.client flag so that .. it works on the client but without the original

getItem (KEY, defaultValue = null) {
    const value = JSON.parse(localStorage.getItem(KEY))
    if (!value) {
      return defaultValue
    }
    return value
  },

Answer 1

process.client is just a check for the rendering type, not a guarantee of the client one :)
It's not clear in your code where exactly the getItem method is called.
Based on this, I can only say one thing - pull it in the mounted hook, in which the window object is definitely available (localStorage is its property)