I am wokring a react-redux, which displays cannot read property 'id' of undefined->>> const newstate=state.filter((todo)=>todo.id ! == action.payload.id);

import React,{Component} from 'react';
import * as uuid from 'uuid';
import { render } from '@testing-library/react';

class TodoList extends React.Component{
state={
text:''
}
onChange=(e)=>{
this.setState({
text:e.target.value,
})
}
onClick=()=>{
const id =uuid.v4();
this.props.addTodo(id,this.state.text)
}

onDelete=(id)=>{

this.props.deteleTodo(id)
}
render(){
return(
<div>
<ul>
{this.props.todos.map((todo)=>(
<li key={todo.id}>{todo.text}

<button onClick={this.onDelete(todo.id)}>delete</button>
</li>
)

)}
</ul>
<input value ={this.state.text} onChange= {this.onChange}/>
<button onClick={this.onClick}> Add toto</button>
</div>
)
}
}
export default TodoList
--------------------------------------------------------------

my reducer

export default (state =[],action)=>{
switch (action.type){
case 'ADD_TODO':
return[...state, action.payload];
case 'REMOVE_TODO':
const newState=state.filter((todo)=>todo.id !== action.payload.id);
return newState;
default:
return state;
}
}

import {combineReducers} from 'redux'
import todosReducer from './todos'
export default combineReducers({
todos:todosReducer,
})

-------my action

export const addTodo =(id,text)=>({
type:'ADD_TODO',
payload:{id,text},
});
export const deteleTodo=(id)=>({
type: 'REMOVE_TODO',
payload:id
})

-----my containers

import {connect} from 'react-redux'
import TodoList from '../components/todo-list'
import {addTodo,deteleTodo} from '../actions/add-todo'
const mapStateToProps=(state)=>({
todos:state.todos,
})
const mapDispatchToProps=(dispatch)=>
{
return{
addTodo:(id,text)=>dispatch(addTodo(id,text)),
deteleTodo:(id)=>dispatch(deteleTodo(id))
}
}
export default connect (mapStateToProps,mapDispatchToProps)(TodoList)

2 Comments

<button onClick={() => this.onDelete(todo.id)}>delete</button>