mern-todo-app/src/components/todos-list.component.js

import React from "react"
import { Link } from "react-router-dom"
import axios from "axios"

const Todo = props => (
    <tr>
        <td> {props.todo.todo_description} </td>
        <td> {props.todo.todo_responsible} </td>
        <td> {props.todo.todo_priority} </td>
        <td>
            <Link to={`/edit/${props.todo._id}`}>Edit</Link>
        </td>
    </tr>
)

export default class TodosList extends React.Component {
    constructor(props) {
        super(props);

        this.state = { todos: [] };
    }

    componentDidMount() {
        axios.get('http://localhost:4000/todos/')
            .then(response => { this.setState({ todos: response.data }) })
            .catch( error => { console.log(error) })
    }

    todoList() {
        return this.state.todos.map((currentTodo, item) => {
            return <Todo todo={currentTodo} key={item} />
        })
    }

    render() {
        return (
            <div>
                <h3>Todos List</h3>
                <table className="table table-striped" style={{ marginTop: 20 }} >
                    <thead>
                        <tr>
                            <th>Description</th>
                            <th>Responsible</th>
                            <th>Priority</th>
                            <th>Action</th>
                        </tr>
                    </thead>
                    <tbody>
                        { this.todoList() }
                    </tbody>
                </table>
            </div>
        )
    }
}