sclass JAutoWidthHTMLLabel extends JLabel {
  IF0<S> makeContents;
  
  *(IF0<S> *makeContents) {
    topAlignLabel(this);
    onResize(this, r update);
  }
  
  void update {
    main setText(this, hhtml(hdiv(makeContents!, width := getWidth(l))));
  }
}