Vue 3: How to prevent unwanted re-renders when updating a computed property?
I've encountered a strange issue with I'm facing an issue with unnecessary re-renders in my Vue 3 application when updating a computed property that depends on multiple reactive data sources. I have a component that displays a list of items, and I want to compute a filtered list based on user input. However, every time the input changes, it seems to trigger a re-render of the entire list, which is causing performance issues, especially when dealing with a large dataset. Here’s a simplified version of my component: ```vue <template> <input v-model="filter" placeholder="Type to filter items..." /> <ul> <li v-for="item in filteredItems" :key="item.id">{{ item.name }}</li> </ul> </template> <script> export default { data() { return { filter: '', items: [ { id: 1, name: 'Apple' }, { id: 2, name: 'Banana' }, { id: 3, name: 'Orange' }, // ...more items ] }; }, computed: { filteredItems() { return this.items.filter(item => item.name.toLowerCase().includes(this.filter.toLowerCase())); } } }; </script> ``` I've tried using the `v-once` directive on the `ul` element, but it didn't work as expected because the list needs to update when the filter changes. I also looked into using a `watch` on the `filter` property, but it just introduced more complexity than I wanted. When I log the updates, I see multiple calls to the computed property, which is what I suspect is causing the re-renders. I’m using Vue 3.2.0, and I’m not sure how to optimize this without losing the reactivity of my input and the list. Is there a recommended pattern or best practice for handling such scenarios in Vue 3? Any help would be greatly appreciated! Any pointers in the right direction?