reselect - npm Package Versions

v4.0.0 - 2018/09/30

New Features

Exposed selector dependencies (#251)
Use provided memoize function for selectors (#297)

Breaking Changes

Updated TypeScript typings (#274, #315)

v3.0.0 - 2017/03/24

New Features

Performance improvements (thanks to @johnhaley81)
Updated Typescript typings (thanks to everyone who helped)

Breaking Changes

For performance reasons, a selector is now not recalculated if its input is equal by reference (===).

Example:

import { createSelector } from 'reselect'

const mySelector = createSelector(
  state => state.values.filter(val => val < 5),
  values => {
    console.log('calling..')
    return values.reduce((acc, val) => acc + val, 0)
  }
)

var createSelector = require('./dist/reselect.js').createSelector

const mySelector = createSelector(
  state => state.values.filter(val => val < 5),
  values => {
    console.log('calling..')
    return values.reduce((acc, val) => acc + val, 0)
  }
)

var state1 = { values: [1, 2, 3, 4, 5, 6, 7, 8, 9] }
console.log(mySelector(state1))
state1.values = [3, 4, 5, 6, 7, 8, 9]
console.log(mySelector(state1))
var state2 = { values: [1, 2, 3, 4, 5, 6, 7, 8, 9] }
console.log(mySelector(state2))
var state3 = { values: [3, 4, 5, 6, 7] }
console.log(mySelector(state3))