What is the problem?
Cannot find module / Module not found 几乎都是这 6 类:依赖没装、import 路径写错、大小写不一致、tsconfig alias 没配、node_modules 坏了、文件没建。逐条给真实定位和修复命令。
Quick solution
Treat this as a Node.js errors troubleshooting issue. First confirm the environment, inputs, permissions, logs, and delivery boundary. Then use the linked deep guide for the full checklist before changing production code or promising a result.
Read the deep guideDetailed steps
- 是第三方包 → 多半没装或装错位置(见 ①⑤)
- 是自己的文件 → 多半路径、大小写或 alias 问题(见 ②③④⑥)
- 看模块名是包还是自己的文件。
- 是包:`npm ls <包名>` 确认装没装、`npm install`。
- 是文件:核对路径层级 → 大小写 → alias 配置。
- 都对还报,删 `node_modules` 重装。
Commands or code
npm install # 先把已声明的依赖装全
npm install <包名> # 缺哪个装哪个Risk notes
Confirm the real project environment, account permissions, platform rules, and output quality before delivery. Do not ship AI-generated changes without human review, and do not claim indexing, income, deployment success, or ranking improvements without measured evidence.