import React from "react"; class MainBody extends React.Component { render() { const requestOptions = { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ title: 'React POST Request Example' }) }; fetch('https://jsonplaceholder.typicode.com/posts', requestOptions) .then(response => response.json()) .then(data => this.setState({ postId: data.id })); return (