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by ne8il 3813 days ago
I haven't looked over the changelog/breaking changes for 4.0.0, so this may not encompass everything there, but there are a few changes you need to be aware of. How hard it is depends on which functions you use currently, but I doubt it would take more than an hour of find-replace work. They are listed here : https://github.com/lodash/lodash/wiki/Migrating The ones that affected me the most were the changes to the overloaded _.first, _.last, etc, but YMMV.