Render an array of objects react - reactjs

Question

This is parent object:
import React, { Component } from "react";
import uuid from 'react-uuid';
import Context from "../../context/Context";
import ItemInput from "./input-components/ItemInput";
export default class InputContainer extends Component {
constructor(props) {
super(props);
this.state = {
name: '',
item: {
id: '',
toDo: ''
},
listItems: []
};
this.onItemChange = this.onItemChange.bind(this);
this.onItemAdd = this.onItemAdd.bind(this);
}
onItemChange(event) {
this.setState({
item: {
id: uuid(),
[event.target.name]: event.target.value
}
});
}
onItemAdd(event) {
event.preventDefault();
const { item } = this.state;
this.setState({ listItems: [...this.state.listItems, item] });
document.getElementById('formItem').reset();
}
render() {
const currentItem = this.onItemChange;
const addItem = this.onItemAdd;
const listItems = this.state.listItems;
return (
<div className="box">
<Context.Provider
value={{ currentItem, addItem, listItems }}
>
<DisplayItems />
<ItemInput />
</Context.Provider>
</div>
);
}
}
ItemInput:
import React, { useContext } from "react";
import Context from "../../../context/Context";
export default function ItemInput() {
const { currentItem, addItem } = useContext(Context);
return (
<form className="item" id="formItem">
<input
onChange={currentItem}
type="text"
className="newInput"
name="toDo"
placeholder="New Task"
autoComplete="off"
/>
<button onClick={addItem} className="checkButton">
<i className="fas fa-check fa-sm"></i>
</button>
</form>
);
}
DisplayItems:
import React, { useContext } from "react";
import Context from "../../../context/Context";
export default function DisplayItems() {
const { listItems, removeItem } = useContext(Context);
return (
<div>
{listItems.map((item) =>
<div className="item" key={item.id} >
<input type="checkbox" />
<p className="listItem">{item}</p>
<button
className="delete-btn"
type="submit"
onClick={removeItem.bind(this, item.id)}
>
<i className="far fa-trash-alt fa-sm"></i>
</button>
</div>
)}
</div>
)
}
When im trying to add new object console gives me this error:
Uncaught Error: Objects are not valid as a React child (found: object
with keys {id, toDo}). If you meant to render a collection of
children, use an array instead.
As far as i understand there's something wrong in my Display Items rendering function, can you suggest whats wrong pls?

Answer 1

item is an object, that why react yelling the error at you. React cant render an object.
// You previously define item as an object: item: { id: '', toDo: ''}
// So the JSX below result in error
<p className="listItem">{item}</p>
Beside JSX, expressions inside render function should return a string (or can be convert to a string). So it should be something like
<p className="listItem">{item.toDo}</p>