📝It is preferable to have a single version of each library

When resolving dependencies, it is preferable to have a single version of each library.

Pros

• decreased bundle size

• libraries can interoperate

Cons

• requires dependency resolution and proper version annotations / version compatibility information, which is hard to do properly

  • Dependencies’ version constraints require additional maintenance work

• sometimes, a single version cannot satisfy all constraints

Examples

• npm does a good job trying to satisfy all constraints, but if it cannot, it installs multiple versions of a package (scoped to the dependent). This might lead to incompatibility issues, but sometimes it works fine. (It helps that js is dynamically typed.)

Backlinks

• 📝 § Package management and versioning
• 📝 Libraries should communicate dependencies’ versions constraints
• 📝 Libraries should not pin specific versions of dependencies