freeCodeCamp/curriculum/challenges/english/03-front-end-libraries/redux/dispatch-an-action-event.english.md

id	title	challengeType	isRequired
5a24c314108439a4d403614f	Dispatch an Action Event	6	false

Description

dispatch method is what you use to dispatch actions to the Redux store. Calling store.dispatch() and passing the value returned from an action creator sends an action back to the store. Recall that action creators return an object with a type property that specifies the action that has occurred. Then the method dispatches an action object to the Redux store. Based on the previous challenge's example, the following lines are equivalent, and both dispatch the action of type LOGIN:

store.dispatch(actionCreator());
store.dispatch({ type: 'LOGIN' });

Instructions

The Redux store in the code editor has an initialized state that's an object containing a login property currently set to false. There's also an action creator called loginAction() which returns an action of type LOGIN. Dispatch the LOGIN action to the Redux store by calling the dispatch method, and pass in the action created by loginAction().

Tests

tests:
  - text: Calling the function <code>loginAction</code> should return an object with <code>type</code> property set to the string <code>LOGIN</code>.
    testString: assert(loginAction().type === 'LOGIN', 'Calling the function <code>loginAction</code> should return an object with <code>type</code> property set to the string <code>LOGIN</code>.');
  - text: The store should be initialized with an object with property <code>login</code> set to <code>false</code>.
    testString: assert(store.getState().login === false, 'The store should be initialized with an object with property <code>login</code> set to <code>false</code>.');
  - text: The <code>store.dispatch()</code> method should be used to dispatch an action of type <code>LOGIN</code>.
    testString: "getUserInput => assert((function() {  let noWhiteSpace = getUserInput('index').replace(/\\s/g,''); return noWhiteSpace.includes('store.dispatch(loginAction())') || noWhiteSpace.includes('store.dispatch({type: \\'LOGIN\\'})') === true })(), 'The <code>store.dispatch()</code> method should be used to dispatch an action of type <code>LOGIN</code>.');"

Challenge Seed

const store = Redux.createStore(
  (state = {login: false}) => state
);

const loginAction = () => {
  return {
    type: 'LOGIN'
  }
};

// Dispatch the action here:

Solution

const store = Redux.createStore(
  (state = {login: false}) => state
);

const loginAction = () => {
  return {
    type: 'LOGIN'
  }
};

// Dispatch the action here:
store.dispatch(loginAction());