Facebook has launched Yarn, an open source JavaScript package manager that promises faster and more reliable installs than the massively popular npm. The company says its new creation is capable of reducing install times from several minutes to just seconds in some cases – depending on the size of the packages you’re working with, of course. Yarn is compatible with the npm registry, but differs in its approach to installing packages; it uses lockfiles and a deterministic installation algorithm. This allows it to maintain the same structure of node_modules directories – which house dependencies – for all users involved in…

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