npm downloads every dependency recursively. If a depends on d (= 1.2.3) and b depends on d (= 1.2.4), then both versions of d get downloaded into a and b’s respective node_modules.
All other package managers I’m aware of resolve dependencies into a flat list then download, and you can only have one version of the same package on your system.
npmdownloads every dependency recursively. Ifadepends ond (= 1.2.3)andbdepends ond (= 1.2.4), then both versions ofdget downloaded intoaandb’s respectivenode_modules.All other package managers I’m aware of resolve dependencies into a flat list then download, and you can only have one version of the same package on your system.