调用接口：

https://s0.wp.com/mshots/v1/$domain

HTML代码：

<div class="links">
    <img class="link_bg" src=""/>
    <a href="https://zhaowenlong.com/">links</a>
</div>

JS代码：

window.addEventListener('DOMContentLoaded', (event) => {
  const linkElements = document.querySelectorAll('.link');

  linkElements.forEach((linkElement) => {
    const anchorElement = linkElement.querySelector('a');

    if (anchorElement) {
      const href = anchorElement.getAttribute('href');
      const linkBgImage = linkElement.querySelector('.link_bg');

      if (linkBgImage) {
        linkBgImage.src = `https://s0.wp.com/mshots/v1/${encodeURIComponent(href)}`;
      }
    }
  });
});

添加适当的css即可正常显示了。