How to Check if a npm Package is Compatible with Your Framework

Three ways to check if an npm package works with your Angular, React, or Vue version — before installing and dealing with errors.

Check Before You Install

Installing an incompatible package wastes time and can break your build. Here are three ways to check compatibility before committing to an install.

Method 1: Online Compatibility Checker (Fastest)

Use the DepFixer Compatibility Checker — select your framework, enter the package name, and get an instant answer. No signup needed.

It checks peer dependencies, version requirements, and known conflicts automatically.

Method 2: Check package.json on npm

Go to npmjs.com/package/[name] and look at the peerDependencies field. If it says "react": "^17 || ^18" and you're on React 19, it might not work.

Limitation: this only checks one level deep. Your package might depend on another package that conflicts.

Method 3: Scan Your Full Project

For a thorough check, scan your entire project:

Web: Upload your package.json — analyzes all dependencies at once
CLI: npx depfixer — runs in your project directory

This catches transitive conflicts, deprecated packages, and version alignment issues that manual checking would miss.

What to Check For

Peer dependency range: Does the package support your framework version?
Last publish date: Packages not updated in 2+ years may not support newer frameworks.
Deprecation: Some packages are abandoned. Check for official replacements.
TypeScript support: Does it include types or need @types/?