Node.js 16 + npm 7: Works but Peer Dependency Strictness Breaks Older Projects
Node.js 16+npm 7
npm 7 was the default shipped with Node.js 16.x initial releases. Its strict peer dependency enforcement broke many projects that worked fine on npm 6. Packages with unresolved peer conflicts produce `ERESOLVE` errors requiring `--legacy-peer-deps`. Node.js 16 is EOL (September 2023). Upgrade both.
Required Flags / Config
--legacy-peer-deps
Workarounds & Fixes
Pass `--legacy-peer-deps` to restore npm 6 peer dep behavior
Pin peer conflicts using `overrides` in package.json (npm 8.3+ syntax)