Why does using array index as key cause UI bugs?

Why does using array index as key cause UI bugs?

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: medium

标签: interviewbit, react, topic-specific, javascript, frontend

参考答案摘要

React uses key to understand which list item is which between renders. When you use the array index as a key, that identity can break when the list changes. Here’s a common example: {items.map((item, ...

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