Element: ariaDetailsElements 属性

<button aria-details="details1 details2">Button text</button>
…
<span id="details1">Details 1 information about the element.</span>
<span id="details2">Details 2 information about the element.</span>

<pre id="log"></pre>

#log {
  height: 70px;
  overflow-x: scroll;
  padding: 0.5rem;
  border: 1px solid black;
}

const logElement = document.querySelector("#log");
function log(text) {
  logElement.innerText = `${logElement.innerText}${text}\n`;
  logElement.scrollTop = logElement.scrollHeight;
}

const buttonElement = document.querySelector("button");
log(`aria-details: ${buttonElement.getAttribute("aria-details")}`);
// Feature test for ariaDetailsElements
if ("ariaDetailsElements" in Element.prototype) {
  // Get ariaDetailsElements
  const buttonElements = buttonElement.ariaDetailsElements;
  log(`ariaDetailsElements: ${buttonElements}`);

  // Accessible details from ariaDetailsElements
  const text = buttonElements.map((e) => e.textContent.trim()).join(" ");
  log(`Accessible details: ${text.trim()}`);
} else {
  log("element.ariaDetailsElements: not supported by browser");
}