setAttribute method

void setAttribute(
  1. String name,
  2. String? value, {
  3. String? namespace,

Set the attribute value with the given fully qualified name to value. If an attribute with the name already exist, its value is updated. If the value is null, the attribute is removed.


void setAttribute(String name, String? value, {String? namespace}) =>
    throw UnsupportedError('$this has no attributes.');