A nice example of the remarkable modularity in the npm ecosystem: Yarn just split out its lockfile parser https://github.com/yarnpkg/yarn/pull/4114
miniblog.
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I've seen 'modularity shaming' for JS libraries that are big and make sites slow to load. I'm surprised to see Wikipedia start reporting on app size though!
I learn recently that JSHint is deprecating style warnings in favour of JSCS. The node.js community has amazing modularity.