<div>
  <h1>Show a File Content</h1>
  <input type="file" id="file-uploader" accept=".jpg, .jpeg, .png" >
  
  <div id="image-grid">
    
  </div>
    
  
</div>

html {
  height: 100%;
}

body {
  background: #000000;
  color: #FFFFFF;
}

div {
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
  font-family: 'Roboto Mono', monospace;
}

const fileUploader = document.getElementById('file-uploader');
const reader = new FileReader();
const imageGrid = document.getElementById('image-grid');

fileUploader.addEventListener('change', (event) => {
  const files = event.target.files;
  const file = files[0];
  reader.readAsDataURL(file);
  
  reader.addEventListener('load', (event) => {
    const img = document.createElement('img');
    imageGrid.appendChild(img);
    img.src = event.target.result;
    img.alt = file.name;
  });
});