Vue.js is updating state, yet the view remains static and does not re-render

My experience with learning Vue.js has been great, but I keep encountering a problem where setting a data property based on state doesn't update the component when the state changes.

For instance...

Check out these code snippets

<router-link v-if="!isDisabled" :to="{ path: '/effects' }">
   <button class="stepButton" :class="{ disabled: false }">Next</button>
</router-link>

<button v-else class="stepButton" :class="{ disabled: isDisabled }">Next</button>


data: function(){
            return {
                ailmentsLib: [
                    "Chronic Pain",
                    "Migraines",
                    "Muscle Spasms",
                    "Stress",
                    "Vertigo",
                    "Nausea"
                ],
                search: '',
                searchMatch: true,
                ailments: [
                    "Chronic Pain",
                    "Migraines",
                    "Muscle Spasms",
                    "Stress",
                    "Vertigo",
                    "Nausea"
                ],
                isDisabled: this.$store.state.ailment.length < 1 ? true : false
            }   
        }

While I can see the state changing in my vue inspector, the button remains disabled.

javascriptvue.js

Answer №1

The issue lies in the fact that data() does not respond to changes in the store. To address this, you should utilize a computed property to monitor state modifications. Here is an example:

computed: {
    isDisabled: function ()  {
        return this.$store.state.ailment.length < 1
    }
}

Answer №2

If you require data manipulation and reusability, utilizing getters is also an option. Explore Vuex Getters

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