Map<String, String> dataset

Allows access to all custom data attributes (data-*) set on this element.

The keys for the map must follow these rules:

  • The name must not begin with 'xml'.
  • The name cannot contain a semi-colon (';').
  • The name cannot contain any capital letters.

Any keys from markup will be converted to camel-cased keys in the map.

For example, HTML specified as:

<div data-my-random-value='value'></div>

Would be accessed in Dart as:

var value = element.dataset['myRandomValue'];

See also:

Source 

Map<String, String> get dataset => new _DataAttributeMap(attributes);
void dataset=(Map<String, String> value)

Source 

set dataset(Map<String, String> value) {
  final data = this.dataset;
  data.clear();
  for (String key in value.keys) {
    data[key] = value[key];
  }
}