What are the differences between localStorage and sessionStorage in Vue 3?

What are the differences between localStorage and sessionStorage in Vue 3?

In Vue 3, localStorage and sessionStorage are both part of the Web Storage API, but they serve different purposes. localStorage persists data even after the browser is closed, while sessionStorage only keeps data for the duration of the page session.

Can you give me an example of how to use localStorage in a Vue 3 component?

Sure! You can use localStorage in a Vue 3 component like this:

export default {
  data() {
    return {
      myData: ''
    };
  },
  mounted() {
    this.myData = localStorage.getItem('myKey') || '';
  },
  methods: {
    saveData() {
      localStorage.setItem('myKey', this.myData);
    }
  }
};

This code retrieves data from localStorage when the component mounts and saves data when the saveData method is called.

What about sessionStorage? How is it used?

Using sessionStorage is quite similar. Here's an example:

export default {
  data() {
    return {
      sessionData: ''
    };
  },
  mounted() {
    this.sessionData = sessionStorage.getItem('sessionKey') || '';
  },
  methods: {
    saveSessionData() {
      sessionStorage.setItem('sessionKey', this.sessionData);
    }
  }
};

This will store data for the session and clear it when the tab is closed.

When should I use localStorage over sessionStorage?

You should use localStorage when you need to persist data across sessions, like user preferences. Use sessionStorage for temporary data that should only last as long as the tab is open, like form data.