[jdd]

lodash v2 offers an Underscore build that aligns its chaining and other API with Underscore providing a full drop-in replacement. However because lodash is a superset of Underscore those using the Underscore build lose out on additional methods, optimizations, & cross environment fixes.

Over the last year Underscore has align more & more with lodash’s API so the need for a separate Underscore build has diminished. If you still need compatibility around some of the edges you should leverage modules in lodash v3 to supplement your Underscore use until the time you can drop Underscore completely.