What is the best way to retain data when a Vue page is about to close?

As far as my understanding goes, it seems that closing or refreshing a page does not trigger the 'beforedestroy' and 'destroyed' hooks in Vue. In order to work around this issue, one possible solution could be to utilize the following

window.onbeforeunload = function() { ... }

Below is an example of how you can achieve this:

mounted() {
            window.onbeforeunload = function() {
                window.localStorage.setItem('form', JSON.stringify(this.form))
            }
        }

However, when trying to store data using this method, it appears that 'this.form' is undefined. This suggests that the instance has already been destroyed by the time the function is called. Are there any alternative approaches to handling this situation?

Answer №1

To avoid shadowing the this keyword, opt for an arrow function over defining an anonymous one:

window.onbeforeunload = () => { 
  window.localStorage.setItem('form', JSON.stringify(this.form)) 
}

Answer №2

Storing data before a page is closed poses a challenge due to browser actions and the severed connection between client and server upon page closure. One workaround could be to periodically save data at set intervals, ensuring information is preserved regardless of when the user exits the page.

Answer №3

Consider implementing vue-persist, a useful library in Vue that allows you to store values persistently even when the window is closed, unlike traditional localStorage.

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