Component failing to refresh with each key modification

My understanding is that adding a key attribute to a component should make it reactive when the key changes. However, with a v-navigation-drawer from Vuetify, this doesn't seem to have any impact.

I've tried making arbitrary changes to the loggedIn key such as using += 1, which should trigger a re-render of the component.

The scenario here involves having a global navigation drawer that displays context based on whether the user is logged in or not.

Full code snippet of the component:

<template>
// Component template code goes here
</template>

<script>
export default {
  // Component data, methods, mounted function and watch section
}
</script>

I'm wondering if there are specific conditions that need to be met for the key changes to take effect, or if this functionality should be working as expected. I've confirmed that loggedIn does indeed change upon logging in.

Another theory I considered was that due to the presence of the v-if directive, the component might be removed during the key change, but I have already ruled out this possibility.

Answer №1

As mentioned by Antonio, the main issue is that I have not utilized any reactive data for the key and dependencies of the v-if directive.

In my code above, even after logging in, the value of user remains false, which is crucial for determining the context of an authenticated user. Although I tried to update them in the mounted() hook and on route changes, this approach feels like a temporary hack.

After logging in:

https://i.stack.imgur.com/ABtti.png

The solution lies in using a computed property with a Vuex getter, triggering a re-render of the component.

https://i.stack.imgur.com/buBy4.png

Therefore, I made some modifications to the code as shown below (although subject to potential further changes as I work towards rectifying current mistakes while also maintaining readability).

  computed: {
    loggedIn: {
      get() {
        return this.$store.state.isLoggedIn
      },
      set(value) {
        this.$store.commit('updateLoggedInState', value)
      }
    },
    user: {
      get() {
        return JSON.parse(this.$store.state.authenticatedUser)
      }
    }
  }

Post-login: https://i.stack.imgur.com/YYL6Q.png

An easy solution and a valuable lesson learned today! Many thanks to Antonio for the assistance.

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