HTMLOutputElement: htmlFor property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since ⁨August 2016⁩.

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The htmlFor property of the HTMLOutputElement interface is a string containing a space-separated list of other elements' ids, indicating that those elements contributed input values to (or otherwise affected) the calculation. It reflects the for attribute of the <output> element.

Value

A string.

Examples

const outputElem = document.getElementById("result");
for (const id of outputElem.htmlFor.split(" ")) {
  const elem = document.getElementById(id);
  elem.style.outline = "2px solid red";
}