description

# first property

TextTrackCue get first
override

The first element.

Throws a StateError if `this` is empty. Otherwise returns the first element in the iteration order, equivalent to `this.elementAt(0)`.

## Implementation

    TextTrackCue get first {
      if (this.length > 0) {
        return JS('TextTrackCue', '#[0]', this);
      }
      throw new StateError("No elements");
    }

set first (TextTrackCue value)
inherited

The first element of the list.

The list must be non-empty when accessing its first element.

The first element of a list can be modified, unlike an Iterable. A `list.first` is equivalent to `list[0]`, both for getting and setting the value.

    final numbers = <int>[1, 2, 3];
    print(numbers.first); // 1
    numbers.first = 10;
    print(numbers.first); // 10
    numbers.clear();
    numbers.first; // Throws.

## Implementation

    void set first(E value) {
      if (length == 0) throw IterableElementError.noElement();
      this[0] = value;
    }