const getPosts = () =>
    new Promise((resolves, rejects) => {
        const api = `https://jsonplaceholder.typicode.com/posts`;
        const request = new XMLHttpRequest();
        request.open("GET", api);
        request.onload = () =>
            request.status === 200
                ? resolves(JSON.parse(request.response))
                : rejects(Error(request.statusText));
        request.onerror = err => rejects(err);
        request.send();
    });

function printPosts(json) {
    for (let post of json) {
        const {title, body} = post;
    console.log(`Title: ${title}\nBody: ${body}`)
  }
}

getPosts()
.then(response => printPosts(response))
.catch(err => console.error(`ERROR MSG: ${error.message}`));