The value property of the Attr interface contains the value of the attribute.


A string representing the attribute value.


The following example displays the current value of the attribute test. Clicking on the button will change it to a different value, and read it again to update the displayed value.

HTML Content

<label test="initial value"></label>

<button>Click me to set test to <code>"a new value"</code></button>

  Current value of the <code>test</code> attribute:
  <output id="result">None.</output>

JavaScript Content

const element = document.querySelector("label");
const button = document.querySelector("button");
const result = document.querySelector("#result");

const attribute = element.attributes[0];
result.value = attribute.value;

button.addEventListener("click", () => {
  attribute.value = "a new value";
  result.value = attribute.value;


DOM Standard
# dom-attr-value

Browser compatibility

BCD tables only load in the browser