Keyed v-for for Efficient Updates

Explain the importance of using keys in v-for for maintaining state and minimizing DOM manipulations during list updates.
      <!-- Use v-for with a :key for efficient updates -->
      <li v-for="item in items" :key="">
        {{ item.text }}

export default {
  data() {
    return {
      items: [
        { id: 1, text: 'Item 1' },
        { id: 2, text: 'Item 2' },
        // More items...
  // Methods to update items...
This Vue.js template snippet demonstrates using 'v-for' with a ':key' to iterate over an array of items. The ':key' is bound to a unique identifier for each item, which allows Vue to track each node's identity and reorder existing elements when the list changes, rather than completely re-rendering the list. Efficiently updating the DOM in this way minimizes manipulation and maintains internal component state.