What is “key” prop and what is the benefit of using it in arrays of elements?

题目类型: 行为面试题

这是一道行为面试题，常见于澳洲IT公司面试中。

难度: medium

参考答案摘要

A key is a special attribute you should include when mapping over arrays to render data. Key prop helps React identify which items have changed, are added, or are removed. Keys should be unique among ...

本题提供 STAR 原则详细解答和技术解析，登录匠人学院学习中心即可查看完整答案。