reducer-patterns

reducer-patterns : object

Kind: global namespace

• reducer-patterns : object
  • .async : object
    • .ConditionalReducer(condition, onTrue, onFalse) ⇒ function
    • .InitState(initializer) ⇒ taskFunction
    • .PostprocessState(reducer, postprocessor) ⇒ function
    • .SeriesReducer(...reducers) ⇒ function
    • .SwitchReducer(...reducers) ⇒ function
  • .ConditionalReducer(condition, onTrue, onFalse) ⇒ function
  • .InitState(initializer) ⇒ taskFunction
  • .PostprocessState(reducer, postprocessor) ⇒ function
  • .SeriesReducer(...reducers) ⇒ function
  • .SwitchReducer(...reducers) ⇒ function

---

reducer-patterns.async : object

Kind: static namespace of reducer-patterns

• .async : object
  • .ConditionalReducer(condition, onTrue, onFalse) ⇒ function
  • .InitState(initializer) ⇒ taskFunction
  • .PostprocessState(reducer, postprocessor) ⇒ function
  • .SeriesReducer(...reducers) ⇒ function
  • .SwitchReducer(...reducers) ⇒ function

---

async.ConditionalReducer(condition, onTrue, onFalse) ⇒ function

 let ConditionalReducer = require('reducer-patterns/async/ConditionalReducer');

 let state = {
   a: 1,
   b: 2,
 };

 let action1 = {
   type: 'a',
   payload: 2,
 };

 let action2 = {
   type: 'b',
   payload: 2,
 };

 let reducer = ConditionalReducer(
   (state, action) => action.type === 'a',
   (state, action) => ({
     ...state,
     a: action.payload,
   })
 );


 // prints action1 result { a: 2, b: 2 }
 // action1 triggers a state update, since it has the correct type
 console.log(
   'action1 result',
   reducer(state, action1)
 );

 // prints action2 result { a: 1, b: 2 }
 // action2 is ignored, since it has the wrong type
 console.log(
   'action2 result',
   reducer(state, action2)
 );

ConditionalReducer

Kind: static method of async
Params

• condition function - a condition task.
• onTrue function - reducer to run if true.
• onFalse function - reducer to run if false.

---

async.InitState(initializer) ⇒ taskFunction

InitState accepts an initializer function/value, and builds an initial state if none exists

Kind: static method of async
Params

• initializer function - a condition task.

---

async.PostprocessState(reducer, postprocessor) ⇒ function

PostprocessState

Kind: static method of async
Params

• reducer function - the reducer to wrap around.
• postprocessor function - the postprocessor function to call after the reducer.

---

async.SeriesReducer(...reducers) ⇒ function

SeriesReducer accepts any number of reducers, and builds a new reducer that chains them together in series

Kind: static method of async
Params

• ...reducers function - all reducers.

---

async.SwitchReducer(...reducers) ⇒ function

Kind: static method of async
Params

• ...reducers function - all reducers.

---

reducer-patterns.ConditionalReducer(condition, onTrue, onFalse) ⇒ function

 let ConditionalReducer = require('reducer-patterns/ConditionalReducer');

 let state = {
   a: 1,
   b: 2,
 };

 let action1 = {
   type: 'a',
   payload: 2,
 };

 let action2 = {
   type: 'b',
   payload: 2,
 };

 let reducer = ConditionalReducer(
   (state, action) => action.type === 'a',
   (state, action) => ({
     ...state,
     a: action.payload,
   })
 );


 // prints action1 result { a: 2, b: 2 }
 // action1 triggers a state update, since it has the correct type
 console.log(
   'action1 result',
   reducer(state, action1)
 );

 // prints action2 result { a: 1, b: 2 }
 // action2 is ignored, since it has the wrong type
 console.log(
   'action2 result',
   reducer(state, action2)
 );

ConditionalReducer

Kind: static method of reducer-patterns
Params

• condition function - a condition task.
• onTrue function - reducer to run if true.
• onFalse function - reducer to run if false.

---

reducer-patterns.InitState(initializer) ⇒ taskFunction

InitState accepts an initializer function/value, and builds an initial state if none exists

Kind: static method of reducer-patterns
Params

• initializer function - a condition task.

---

reducer-patterns.PostprocessState(reducer, postprocessor) ⇒ function

PostprocessState

Kind: static method of reducer-patterns
Params

• reducer function - the reducer to wrap around.
• postprocessor function - the postprocessor function to call after the reducer.

---

reducer-patterns.SeriesReducer(...reducers) ⇒ function

SeriesReducer accepts any number of reducers, and builds a new reducer that chains them together in series

Kind: static method of reducer-patterns
Params

• ...reducers function - all reducers.

---

reducer-patterns.SwitchReducer(...reducers) ⇒ function

Kind: static method of reducer-patterns
Params

• ...reducers function - all reducers.

---