Attr: value property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

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

Value

A string representing the attribute value.

Example

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

html

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

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

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

JavaScript

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;
});

Specifications

Specification
DOM Standard # dom-attr-value

Browser compatibility

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