# A Developer’s Guide to Lazy Loading in React and Next.js

Canonical URL: https://www.traeai.com/articles/7fbc518e-34c8-48d5-875a-3e65f0c83401
Original source: https://www.freecodecamp.org/news/a-developers-guide-to-lazy-loading-in-react-and-nextjs/
Source name: freeCodeCamp.org
Content type: article
Language: 英文
Score: 8.5
Reading time: 8 分钟
Published: 2026-04-14T20:31:59+00:00
Tags: React, Next.js, 性能优化, 懒加载, 前端

## Summary

文章详解 React.lazy 和 Next.js 的 next/dynamic 实现懒加载，提升应用性能与核心 Web 指标。

## Key Takeaways

- React.lazy 配合 Suspense 可实现组件级代码分割，减少首屏加载体积
- Next.js 应优先使用 next/dynamic，支持 SSR 且语法更灵活
- 懒加载能显著改善 LCP 和 TBT 等 Core Web Vitals 指标

## Citation Guidance

When citing this item, prefer the canonical traeai article URL for the AI-readable summary and include the original source URL when discussing the underlying source material.