Show information about why a package is installed.
yarn why <query>
This command will identify why a package has been installed, detailing which other packages depend upon it, for example, or whether it was explicitly marked as a dependency in the
yarn why jest
yarn why vx.x.x [1/4] 🤔 Why do we have the module "jest"...? [2/4] 🚚 Initialising dependency graph... [3/4] 🔍 Finding dependency... [4/4] 🚡 Calculating file sizes... info Has been hoisted to "jest" info This module exists because it's specified in "devDependencies". info Disk size without dependencies: "1.29kB" info Disk size with unique dependencies: "101.31kB" info Disk size with transitive dependencies: "20.35MB" info Amount of shared dependencies: 125
The mandatory query argument for
yarn why can be any of:
yarn why node_modules/once
yarn why node_modules/once/once.js
The file locations can also be absolute.
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