Javascript Image Preview

script.js

  const input = document.getElementById('avatar');
  const previewPhoto = () => {
    const file = input.files;
    if (file) {
      const fileReader = new FileReader();
      const preview = document.getElementById('avatar-preview');
      fileReader.onload = function(event) {
        preview.setAttribute('src', event.target.result);
      }
      fileReader.readAsDataURL(file[0]);
    }
  }
  input.addEventListener("change", previewPhoto);