[Medium] 📄 Best Practices

1. Why you shouldn't use index as a key in lists and iterators?

なぜ index を key として使うべきではないのか？

Vue、React などのフレームワークの面接でよく出る類似の質問：

• What happens if there is no key in v-for?
• Why you shouldn't use index as a key in React lists and iterators?