HTMLMeterElement: value property

The value property of the HTMLMeterElement interface represents the current value of the <meter> element as a floating-point number. It reflects the element's value attribute. If no value is set, it is the HTMLMeterElement.min value or 0, whichever is greater.

This property can also be set directly, for example to set a default value based on some condition.

<label for="fuel">Current fuel level:</label>
<meter
  id="fuel"
  min="0"
  max="100"
  low="15"
  high="66"
  optimum="80"
  value="50"></meter>

const meterElement = document.getElementById("fuel");
console.log(meterElement.value); // 50
--meterElement.value;
console.log(meterElement.value); // 49