Sample code for XMLHttpRequest

wp-api-http-request-example.js

function getAllCategories() {
  const allCategories = [417, 418, 419, 420, 421, 422]
  
    for (let categories of allCategories) {
    
    let ourRequest = new XMLHttpRequest()
        ourRequest.open('GET', 'https://www.orlandoattractions.com/wp-json/wp/v2/posts?categories=' + categories)
        ourRequest.onload = () => {

          if (ourRequest.status >= 200 && ourRequest.status < 400) {

              const data = JSON.parse(ourRequest.responseText)

              //console.log(data)

              for (let blogData of data) {

                let blogPost = {
                    title : blogData.title.rendered.replace("&#038;", "&").replace("&#8217;", "'"),
                    blogURLString : blogData.link,
                    imageURLString : blogData.better_featured_image.source_url,
                    category : categories
                }

              saveBlogToParse(blogPost)

               //console.log(blogPost)
    //         console.log('title: ' + blogPost.blogTitle)
    //         console.log('URL: ' + blogPost.blogURL)
    //         console.log('Featured Image: ' + blogPost.blogFeaturedIMG)  
              }
        } else {
          console.log("We connected to the server, but it returned an error.")
        }
    };
    
    ourRequest.send()
  }
}

function saveBlogToParse(blog) {
  
  const Blog = Parse.Object.extend('Blog')
  const parseBlog = new Blog()

    parseBlog.save(blog, {
      
    success: function(obj) {
      
      console.log('Successfully saved ' + obj.id + ' ' + blog.title)
      
      },
    error: function(err) {
      
      console.error(err)
      
      }
    });
  
}

getAllCategories()