getAttributeNS 方法

String? getAttributeNS(
  1. String? namespaceURI,
  2. String name
)

实现

@pragma('dart2js:tryInline')
String? getAttributeNS(String? namespaceURI, String name) {
  // TODO(41258): Delete this assertion after forcing strong mode.
  // Protect [name] against string conversion to "null" or "undefined".
  // [namespaceURI] does not need protecting, both `null` and `undefined` map to `null`.
  assert(name != null, 'Attribute name cannot be null');
  return _getAttributeNS(namespaceURI, name);
}