CSS transitions optimization guide on dynamically added elements in Vue 3 - Seeking Solution
Quick question that's been bugging me - I'm working with an scenario where CSS transitions don't seem to work on elements that are dynamically added to the DOM using Vue 3... I have a simple list where items can be added and removed, and I want to apply a fade-in effect when new items are added. However, the transition is not triggering as expected. Here's a simplified version of my component: ```vue <template> <div> <button @click="addItem">Add Item</button> <transition name="fade"> <ul> <li v-for="item in items" :key="item.id">{{ item.text }}</li> </ul> </transition> </div> </template> <script> export default { data() { return { items: [], nextId: 1 }; }, methods: { addItem() { this.items.push({ id: this.nextId++, text: `Item ${this.nextId}` }); } } }; </script> <style> .fade-enter-active, .fade-leave-active { transition: opacity 0.5s; } .fade-enter, .fade-leave-to { opacity: 0; } </style> ``` I've tried troubleshooting this by making sure that the `key` attribute in the `v-for` directive is unique and checked for console errors, but nothing seems to trigger the fade effect on the new items. The existing items transition smoothly when removed, but the new ones don’t appear to animate at all. I’ve also verified that the CSS styles are being applied correctly by inspecting the elements in the browser. Could there be something specific about Vue's rendering lifecycle that's preventing the transition from firing? Any guidance on how to properly implement transitions for dynamically added elements would be greatly appreciated. I'm working on a mobile app that needs to handle this. What are your experiences with this?