How do I list keys in Vue 3?

How do I list keys in Vue 3?

In Vue 3, you can list keys using the v-for directive. For example: <div v-for="item in items" :key="item.id">{{ item.name }}</div>.

What if my items don't have unique IDs?

If your items don't have unique IDs, you can use the index as a key, like this: :key="index". However, it's better to have unique keys for performance.

Can you explain why unique keys are important?

Unique keys help Vue identify which items have changed, been added, or removed, improving rendering performance and avoiding bugs.

Are there any best practices for using keys?

Yes, always use unique and stable keys. Avoid using array indices as keys if the list can change, as it can lead to issues.