Is there a way to automatically install npm peer dependencies?

Other Questions NPM
1

I’m using React and whenever I try to install it, I keep encountering these annoying peer dependency warnings.

npm install --save react
[email protected] /Users/sarah/workspace/my-project
├── [email protected]
├── UNMET PEER DEPENDENCY prop-types@^15.6.0
├── UNMET PEER DEPENDENCY react-dom@^18.0.0
├── UNMET PEER DEPENDENCY lodash@^4.17.21
├── UNMET PEER DEPENDENCY axios@^1.2.0
└── UNMET PEER DEPENDENCY moment@^2.29.0

npm WARN [email protected] requires a peer of prop-types@^15.6.0 but none was installed.
npm WARN [email protected] requires a peer of react-dom@^18.0.0 but none was installed.
npm WARN [email protected] requires a peer of lodash@^4.17.21 but none was installed.
npm WARN [email protected] requires a peer of axios@^1.2.0 but none was installed.
npm WARN [email protected] requires a peer of moment@^2.29.0 but none was installed.

Is there a command line option in npm that can take care of peer dependencies for me? I’d prefer not to install each one manually like this:

npm install --save [email protected] prop-types@^15.6.0 react-dom@^18.0.0 lodash@^4.17.21 axios@^1.2.0 moment@^2.29.0

There must be a simpler method, right?

2

Try npm install --install-peers if ur on npm 7+, but it’s pretty buggy. I just install them manually - more work but you kno exactly what versions u’re getting. That peer dependency list looks weird for React tho. Vanilla React shouldn’t need all those as peers.

3

Nope, npm doesn’t have a built-in flag for auto-installing peer dependencies. I hit this same wall when I started working with React projects a few years ago. I switched to yarn since it had yarn install --peer (though that’s deprecated now). These days I just use npm install --legacy-peer-deps - it won’t auto-install peers but kills those annoying warnings. For a real fix, grab the install-peerdeps package: npm install -g install-peerdeps, then run install-peerdeps react to get both the package and its peers automatically. Saves me tons of time.

4

npm doesn’t auto-install peer dependencies, but I’ve found a solid workaround. Run npx install-peerdeps react and it’ll grab React plus all its peer deps in one shot - no global install needed. Found this after dealing with those same annoying warnings. You can also use npm install --legacy-peer-deps to kill the warning spam, but that won’t actually install the missing dependencies. Side note: lodash and moment aren’t React peer deps - that output seems weird for a standard React install.