attribute method

void attribute(String name, Object? value, { String? namespaceUri, String? namespacePrefix, XmlAttributeType? attributeType, @Deprecated('Use `namespaceUri` instead') String? namespace, })

Adds a XmlAttribute node with the provided name and value.

For the namespace either a previously defined namespacePrefix or namespaceUri can be provided, but not both.

To generate an element with the tag message and the attribute lang="en" one would write:

builder.element('message', nest: () {
   builder.attribute('lang', 'en');
});

Implementation

void attribute(
  String name,
  Object? value, {
  String? namespaceUri,
  String? namespacePrefix,
  XmlAttributeType? attributeType,
  @Deprecated('Use `namespaceUri` instead') String? namespace,
}) {
  final attributeName = _buildName(
    name,
    prefix: namespacePrefix,
    uri: namespaceUri ?? namespace,
  );
  final attributeNode = XmlAttribute(
    attributeName,
    value.toString(),
    attributeType ?? XmlAttributeType.DOUBLE_QUOTE,
  );
  final attributes = _nodes.last.attributes;
  if (value != null) {
    attributes[attributeName.qualified] = attributeNode;
  } else {
    attributes.remove(attributeName.qualified);
  }
}