dart:html

getPropertyValue method

String getPropertyValue(String propertyName)

Returns the value of the property if the provided CSS property name is supported on this element and if the value is set. Otherwise returns an empty string.

Please note the property name uses camelCase, not-hyphens.

Source

String getPropertyValue(String propertyName) {
  var propValue = _getPropertyValueHelper(propertyName);
  return propValue != null ? propValue : '';
}