Vue 3: best practices for 'how to read properties of undefined' when using a computed property dependent on a reactive object?
I'm trying to figure out I'm wondering if anyone has experience with I'm working on a Vue 3 application where I have a reactive object that holds user data... I created a computed property to derive a full name from the first and last name fields in this object. However, I'm working with a 'want to read properties of undefined' behavior when the object is not fully populated. Here's a simplified version of my code: ```javascript <template> <div> <p>Full Name: {{ fullName }}</p> </div> </template> <script> import { ref, computed } from 'vue'; export default { setup() { const user = ref({ firstName: '', lastName: '' }); const fullName = computed(() => { return `${user.value.firstName || ''} ${user.value.lastName || ''}`.trim(); }); // Simulating an API call to fetch user data setTimeout(() => { user.value = { firstName: 'John', lastName: 'Doe' }; }, 1000); return { user, fullName }; } }; </script> ``` Initially, when the component loads, `user` is an empty object, and accessing `user.value.firstName` throws an behavior. I've tried adding optional chaining, but it doesn't seem to resolve the scenario. I've also considered wrapping the computed property in a try-catch block, but this feels like a workaround rather than a solution. I've looked into using watchers or setting default values but would love to hear if there's a more idiomatic way to handle this situation in Vue 3 with Composition API. Any advice on how to prevent this behavior when the data hasn't yet been loaded would be greatly appreciated! My development environment is CentOS. Any ideas how to fix this? The project is a service built with Javascript. Has anyone dealt with something similar?