确保图标链接的可访问性

<a class="my-icon-link" title="my link">
  <span class="visually-hidden">my link</span>
</a>

.my-icon-link {
  background-image: url(/images/icons/my-icon.svg);
}

.visually-hidden { 
  border: 0;
  padding: 0;
  margin: 0;
  position: absolute !important;
  height: 1px; 
  width: 1px;
  overflow: hidden;
  clip: rect(1px 1px 1px 1px); /* ie6, ie7 - a 0 height clip, off to the bottom right of the visible 1px box */
  clip: rect(1px, 1px, 1px, 1px); /*maybe deprecated but we need to support legacy browsers */
  clip-path: inset(50%); /*modern browsers, clip-path works inwards from each corner*/
  white-space: nowrap; /* added line to stop words getting smushed together (as they go onto seperate lines and some screen readers do not understand line feeds as a space */
}

function ensureIconLinkText() {
  let linksWithoutText = document.querySelectorAll("a[href^='http']:empty");
  linksWithoutText.forEach(e => {
    if (window.getComputedStyle(e).display !== "none") {
      if (e.title) {
        let eText = document.createElement("span");
        eText.innerText = e.title;
        eText.classList.add("visually-hidden");
        e.append(eText);
      } else {
        console.error("Link without Text and Title: " + e.outerHTML);
      }
    }
  });
}

ensureIconLinkText();