How to install all dependencies in npm?

Question

JavaScript

How to install all the required dependencies when installing a module?
npm i angular2 --save
outputs:
+-- [email protected]
+-- UNMET PEER DEPENDENCY [email protected]^3.0.2
+-- UNMET PEER DEPENDENCY [email protected]^0.33.3
+- - UNMET PEER DEPENDENCY [email protected]
+-- UNMET PEER DEPENDENCY [email protected]
`-- UNMET PEER DEPENDENCY [email protected]
npm WARN [email protected] requires a peer of [email protected]^3.0.2 but none was installed.
npm WARN [email protected] requires a peer of [email protected]^0.33.3 but none was installed.
npm WARN [email protected] requires a peer of [email protected] but none was installed.
npm WARN [email protected] requires a peer of [email protected] but none was installed.
npm WARN [email protected] requires a peer of [email protected] but none was installed.
Do I need to manually install all packages?

Answer 1

They are optional. If you don't need < IE11 why do you need es6-promise for example

Answer 2

Yes, manually. Or, as suggested in the angular 2 tutorial - take their package.json and just do npm install
https://angular.io/docs/js/latest/quickstart.html#...