lodash-chain

lodash-chain is the minimum viable lodash build needed for _.chain and _.runInContext. The minimal build is ~185kb vs ~540 kb for the complete lodash build.

This is an unofficial package.

lodash-chain optionally also adds a custom method to lodash called _.plugins, which is just a wrapper around _.mixin. The difference is that lodash methods added via _.plugins will be tagged as chainable or not as appropriate (details).

Custom Methods

_.plugins(source, [options={}])

Use _.plugins to add external lodash packages.

const _ = require('lodash-chain')
const set = require('lodash.set')

_.plugins({ set })

let chain = _.chain({ data: {} }).set('data.key', 'value').get('data').value()
// => { key: 'value' }

More Examples

const _ = require('lodash-chain')
const sortBy = require('lodash.sortBy')
const map = require('lodash.map')
const head = require('lodash.head')

_.plugins({ sortBy, map, head })

const users = [
  { 'user': 'barney',  'age': 36 },
  { 'user': 'fred',    'age': 40 },
  { 'user': 'pebbles', 'age': 1 }
];

const youngest = _
  .chain(users)
  .sortBy('age')
  .map(function(o) {
    return o.user + ' is ' + o.age;
  })
  .head()
  .value();
// => 'pebbles is 1'

There methods are included in the minimum viable build by default:

• chainable

  • lodash.chain
  • lodash.constant
  • lodash.defaults
  • lodash.flatten
  • lodash.forOwn
  • lodash.iteratee
  • lodash.keys
  • lodash.keysIn
  • lodash.memoize
  • lodash.mixin
  • lodash.negate
  • lodash.pick
  • lodash.property
  • lodash.reverse
  • lodash.tap
  • lodash.thru
  • lodash.toArray
  • lodash.values

• not chainable

  • lodash.eq = eq;
  • lodash.get = get;
  • lodash.hasIn = hasIn;
  • lodash.identity = identity;
  • lodash.isArguments = isArguments;
  • lodash.isArray = isArray;
  • lodash.isArrayLike = isArrayLike;
  • lodash.isBuffer = isBuffer;
  • lodash.isFunction = isFunction;
  • lodash.isLength = isLength;
  • lodash.isMap = isMap;
  • lodash.isObject = isObject;
  • lodash.isObjectLike = isObjectLike;
  • lodash.isSet = isSet;
  • lodash.isString = isString;
  • lodash.isSymbol = isSymbol;
  • lodash.isTypedArray = isTypedArray;
  • lodash.last = last;
  • lodash.stubArray = stubArray;
  • lodash.stubFalse = stubFalse;
  • lodash.noop = noop;
  • lodash.runInContext = runInContext;
  • lodash.toFinite = toFinite;
  • lodash.toInteger = toInteger;
  • lodash.toNumber = toNumber;
  • lodash.toString = toString;