JavaScript - Set profile image as first letters of first and last name

main.js

function showAuthorInitials(containerSelector, blockSelector, attribute) {
  const container = document.querySelector(containerSelector);
  const blocks = container.querySelectorAll(blockSelector);

  for (let i = 0; i < blocks.length; i++) {
    const block = blocks[i];
    const value = block.getAttribute(attribute);
    const words = value.split(" ");

    let initials = "";
    if (words.length > 1) {
      words.forEach((word, index) => {
        if (index < 2) {
          initials += word.charAt(0);
        }
      });
    } else {
      initials = value.charAt(0);
    }

    block.innerHTML += `<div class="author-initials">${initials}</div>`;
  }
}
// showAuthorInitials(containerSelector, blockSelector, attribute);
showAuthorInitials( ".featured-reviews-list", ".review-block__thumb", "data-author" );