width property
Implementation
@override
CSSLengthValue get width => _width ?? CSSLengthValue.auto;
      
      set
      width
      (CSSLengthValue? value) 
      
    
    
    
Implementation
set width(CSSLengthValue? value) {
  // Negative value is invalid, auto value is parsed at layout stage.
  if ((value != null && value.value != null && value.value! < 0) || width == value) {
    return;
  }
  _width = value;
  _markSelfAndParentNeedsLayout();
  _markScrollContainerNeedsLayout();
}