javascript - react+redux: state of store changed without view changing -


i try use react-redux. use connect in tutorial. have 2 modules export default connect(...)(...). when dispatched in 1 module dev-tools show changing , new state, view of module don't changed.

app.js

const app = (props) => {     return (         <div>             <userform />             <flexgrid>                 {props.teststore.persons.map((data, index) =>                     <personcard data={data} key={index} /> // <!-- not changed                 )}             </flexgrid>         </div>     ); }  export default connect(     state => ({         teststore: state     }),     dispatch => ({}) )(app);

userform.js

const userform = (props) => {     let nameinput, familyinput, patronymicinput;      const adduser = () => {         props.adduser({             name: nameinput.value,             family: familyinput.value,             patronymic: patronymicinput.value         });     }      return (...); }  export default connect(     state => ({         teststore: state     }),     dispatch => ({         adduser: (data) => {             dispatch({ type: 'add_user', data});         }     }) )(userform);

how fix it?

you mutating state in reducer. need keep state immutate this

function storechangehandler(state = stateinit, change) {    if (change.type === 'add_user') {     return{        ...state,        persons: [...state.persons, change.data]     };   }    return state; }

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