how to send post request js fetch

1componentDidMount() {
2    // Simple POST request with a JSON body using fetch
3    const requestOptions = {
4        method: 'POST',
5        headers: { 'Content-Type': 'application/json' },
6        body: JSON.stringify({ title: 'React POST Request Example' })
7    };
8    fetch('https://jsonplaceholder.typicode.com/posts', requestOptions)
9        .then(response => response.json())
10        .then(data => this.setState({ postId: data.id }));
11}