List all dependents of a dependency from lock file

Question

Is it possible to list all dependents of specific dependency from a lock file (npm/pnpm/yarn)?

• It's the opposite of yarn ls
• I prefer not to read the lock file if there is a built-in command in npm/pnpm/yarn

---

I know that I can ask npm registery for that but I'm looking for a solution without network calls (expect npm/pnpm/yarn install)

Answer 1

pnpm and Yarn both have a why command. So you can run <yarn|pnpm> why <pkg>.

In the case of pnpm, pnpm why <pkg> does the same as pnpm ls <pkg> --depth Infinity. It is because pnpm creates a non-flat node_modules.

Output example of pnpm why glob:

@pnpm/registry-mock 1.8.0
├─┬ cpr 3.0.1
│ └─┬ rimraf 2.7.1
│   └── glob 7.1.5
├─┬ rimraf 3.0.0
│ └── glob 7.1.5
└─┬ verdaccio 4.3.4
  ├─┬ bunyan 1.8.12
  │ └─┬ mv 2.1.1
  │   └─┬ rimraf 2.4.5
  │     └── glob 6.0.4
  └─┬ mv 2.1.1
    └─┬ rimraf 2.4.5
      └── glob 6.0.4
tslint 5.20.0
└── glob 7.1.5
verdaccio 4.3.4
├─┬ bunyan 1.8.12
│ └─┬ mv 2.1.1
│   └─┬ rimraf 2.4.5
│     └── glob 6.0.4
└─┬ mv 2.1.1
  └─┬ rimraf 2.4.5
    └── glob 6.0.4