Functions to retrieve a Wordpress post data.

fetchWpPost.js

/* Retrieves Wordpress post data of the post number idx from a domain.
 * Note: idx is the index of the response array of posts.
 */
async function fetchWpPost(domain, idx) {
  try {
    var ret = {};
    const response = await fetch('https://'+domain+'/wp-json/wp/v2/posts')
      .then(response => response.json())
      .then(data => {
          ret.title = data[idx].title.rendered;
          ret.link = data[idx].link;
          ret.text = data[idx].excerpt.rendered;
          ret.id = data[idx].id;
          ret.date = data[idx].date;
          ret.img = "/wp-json/wp/v2/media?parent="+ret.id;
        })
    return ret;
  } catch(e) {
    console.log(e)
  }
}

fetchWpPostImage.js

/* Retrieves the image url of the blog post id */
async function fetchWpPostImage(domain, id) {
    try {
      var ret = "";
      const response = await fetch('https://'+domain+'/wp-json/wp/v2/media?parent='+id)
        .then(response => response.json())
        .then(data => {
            ret = data[0].source_url;
          })
      return ret;
    } catch(e) {
      console.log(e)
    }
}