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HTML

              
                <button id="loader">Show New Post</button>

<section class="news-wrapper" id="news" aria-live="polite">
  <article class="news">
    <h2 class="news__title" id="title"></h2>
    <img class="news__artwork" id="artwork" src="" alt="" />
    <p class="news__content" id="content"></p>
  </article>
</section>
              
            
!

CSS

              
                .news-wrapper {
  /* 1. Grid Layout */
  display: grid;
  grid-template: "content" 100% / auto;
  
  &::after {
    /* 3. Indicator Styles */
    content: "";
    margin: 3rem auto;
    width: 4rem;
    height: 4rem;
    display: block;
    grid-area: content;
    align-self: center;
    justify-self: center;
    border: .5rem solid blue;
    border-left-color: transparent;
    border-radius: 50%;
	  opacity: 0;
	  transition: opacity;
	  pointer-events: none;
    animation: loading-circle 1s ease-in-out infinite;
  }
  
  &[aria-busy="true"] {
    .news {
      opacity: 0.2;
    }
    
    &::after {
      opacity: 1;
    }
  }
}

.news {
  /* 2. Grid Positioning */
  grid-area: content;
  transition: opacity .1s;
}

@keyframes loading-circle {
  to {
    transform: rotate(360deg);
  }
}

// Generic styles
html {
  background-color: #424242;
}

button {
  display: block;
  margin: 2rem auto;
  padding: 1rem 2rem 0.8rem;
  border: 0;
  border-radius: .5rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #fff;
  background: #00838F;
  box-shadow: 0 .25rem .5rem -.25rem #263238;
  
  &:hover,
  &:active,
  &:focus {
    background: #0097A7;
  }
}

.news-wrapper {
  margin: 2rem auto;
  padding: 1rem;
  width: 40rem;
  max-width: calc(100vw - 4rem);
  background-color: #eee;
  box-shadow: 0 .25rem .33rem 0 #263238;
}

.news__title {
  margin: 1rem 0;
  font-size: 2rem;
}

.news__artwork {
  width: 100%;
  height: auto;
  display: block;
}

.news__content {
  margin: 1rem 0;
  font-size: 1.5rem;
}
              
            
!

JS

              
                const posts = [
  {
    id: 1,
    title: 'A Good Article',
    artworkId: 38,
    content: 'This post will give you lots of information.'
  },
  {
    id: 2,
    title: 'Urgent Headline!',
    artworkId: 87,
    content: 'If you don’t read this now, you’ll miss out!'
  },
  {
    id: 3,
    title: 'Breaking News',
    artworkId: 67,
    content: 'No other outlet is reporting about this…'
  },
  {
    id: 4,
    title: 'Pleasant Article',
    artworkId: 11,
    content: 'This news is positive and won’t bum you out.'
  }
]

const loader = document.getElementById('loader')
const news = document.getElementById('news')
const title = document.getElementById('title')
const artwork = document.getElementById('artwork')
const content = document.getElementById('content')

const loadContent = p => {
  news.setAttribute('data-post-id', p.id)
  title.innerHTML = p.title
  artwork.setAttribute('src', `https://picsum.photos/id/${p.artworkId}/500/200`)
  content.innerHTML = p.content
}

loadContent(posts[0])

loader.addEventListener('click', e => {
  news.setAttribute('aria-busy', true)
  setTimeout(() => {
    let currentId = parseInt(news.dataset.postId, 10)
    let differentPosts = posts.filter(p => p.id !== currentId)
    console.log(currentId, differentPosts)
    loadContent(differentPosts[Math.floor(Math.random() * differentPosts.length)])
    news.setAttribute('aria-busy', false)
  }, 1500)
})
              
            
!
999px

Console