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Vue 3 - Unresponsive computed properties when nested within Vuex store modules

👀 Views: 180 💬 Answers: 1 📅 Created: 2025-08-21
vue vuex computed-properties reactivity JavaScript

I'm sure I'm missing something obvious here, but I'm maintaining legacy code that I'm facing an issue with computed properties in Vue 3 that are defined in Vuex store modules... I've set up a Vuex store with namespaced modules, and I'm trying to use a computed property that depends on state from another module. However, the computed property seems unresponsive and does not update when the state changes. Here's what I have: In my Vuex store, I have two modules, `user` and `posts`: ```javascript // store/modules/user.js const state = () => ({ currentUser: null }); const getters = { isUserLoggedIn: (state) => !!state.currentUser }; export default { namespaced: true, state, getters }; // store/modules/posts.js const state = () => ({ allPosts: [] }); const getters = { userPosts: (state, getters, rootState) => { return state.allPosts.filter(post => post.userId === rootState.user.currentUser.id); } }; export default { namespaced: true, state, getters }; ``` In my component, I'm trying to access `userPosts` computed property: ```javascript <template> <div> <h1>User Posts</h1> <ul> <li v-for="post in userPosts" :key="post.id">{{ post.title }}</li> </ul> </div> </template> <script> import { mapGetters } from 'vuex'; export default { computed: { ...mapGetters('posts', ['userPosts']), ...mapGetters('user', ['isUserLoggedIn']) }, }; </script> ``` When I update the `currentUser` in the `user` module, the `userPosts` getter does not seem to react to the change, and the component does not re-render accordingly. I’ve checked that the state is getting updated in Vuex, and I can see the expected `currentUser` value in Vue Devtools. I have tried using `this.$store.watch` to manually force updates, but that feels like an anti-pattern. Is there something I'm missing with how Vuex handles reactivity with namespaced modules? Any help would be greatly appreciated! I recently upgraded to Javascript 3.10. This is happening in both development and production on CentOS. Thanks for any help you can provide!