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Showing content from https://developer.mozilla.org/en-US/docs/Web/API/Element/ariaLabelledByElements below:

Element: ariaLabelledByElements property - Web APIs

An array of elements. The inner text of these elements can be joined with spaces to get the accessible name.

When read, the returned array is a static and read-only. When written, the assigned array is copied: subsequent changes to the array do not affect the value of the property.

Description

The property is a flexible alternative to using the aria-labelledby attribute to set the accessible name. Unlike aria-labelledby, the elements assigned to this property do not have to have an id attribute.

The property reflects the element's aria-labelledby attribute when it is defined, but only for listed reference id values that match valid in-scope elements. If the property is set, then the corresponding attribute is cleared. For more information about reflected element references and scope see Reflected element references in the Reflected attributes guide.

Examples Get the accessible name

This example shows how ariaLabelledByElements can be used to get an ARIA label defined using aria-labelledby.

HTML

The HTML defines two <span> elements and references their ids in the aria-labelledby attribute of an <input>. The accessible name of the <input> is the concatenation of the inner text of the two referenced elements, separated by a space.

<span id="label_1">Street name</span>
<input aria-labelledby="label_1 label_2" />
<span id="label_2">(just the name, no "Street" or "Road" or "Place")</span>

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

JavaScript

The code below first logs the value of the aria-labelledby attribute from Element.getAttribute() (a string listing the id values of the referenced elements). It then checks whether the ariaLabelledByElements is supported, and if so, logs its value. Finally it returns the accessible string, calculated by iterating through the elements and concatenating their inner text.

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

const inputElement = document.querySelector("input");
log(`aria-labelledby: ${inputElement.getAttribute("aria-labelledby")}`);
// Feature test for ariaLabelledByElements
if ("ariaLabelledByElements" in Element.prototype) {
  // Get ariaLabelledByElements
  const labelElements = inputElement.ariaLabelledByElements;
  log(`ariaLabelledByElements: ${labelElements}`);

  // Log inner text of elements to get accessible name
  const text = labelElements.map((e) => e.textContent.trim()).join(" ");
  log(`Accessible name: ${text.trim()}`);
} else {
  log("element.ariaLabelledByElements: not supported by browser");
}

Result

The log below shows the original element references, the associated/returned elements, and the accessible name. Note that the example doesn't do anything with text entered into the street name <input>.

Specifications Browser compatibility

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