1) 101 will be maintained to minimize overlap with vanilla JS.
- 101 utils are made to work well with vanilla JS methods.
- 101 will only duplicate vanilla JS to provide functional programming paradigms or if the method is not available in a widely supported JS version (currently ES5).
- Underscore/lodash - duplicates a lot of ES5: forEach, map, reduce, filter, sort, and more.
2) No need for custom builds.
- With 101, import naturally, and what you use will be bundled.
- Each util method is a module that can be required require('101/<util>').
- Currently node/browserify is supported, I will add other module system support on request.
- Underscore/lodash is large, and you have to manually create custom builds when if you're trying to optimize for size.