Returns the first element.
Throws a StateError if this is empty. Otherwise returns the first element in the iteration order, equivalent to this.elementAt(0).
String get first {
  if (this.length > 0) {
    return JS('String', '#[0]', this);
  }
  throw new StateError("No elements");
}    Updates the first position of the list to contain value.
Equivalent to theList[0] = value;.
The list must be non-empty.
void set first(E value) {
  if (length == 0) throw IterableElementError.noElement();
  this[0] = value;
}
    © 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
    https://api.dart.dev/stable/2.5.0/dart-html/DomStringList/first.html