Custom font size units

The Bootstrap 5 button set includes both fontsize and fontsizeunit, so a custom fontSizeUnits list still makes sense for design systems that mix px, pt, and rem.

Select text, change the size, then switch the unit between px, pt, and rem.

Tip: this is especially helpful when the saved HTML is consumed by multiple renderers.

Example configuration - Font Size Units

summernote.create('#font-size-units-editor', {
  height: 260,
  toolbar: [
    ['fontname', ['fontname']],
    ['fontsize', ['fontsize', 'fontsizeunit']],
    ['font', ['bold', 'italic', 'underline']],
  ],
  fontSizeUnits: ['px', 'pt', 'rem'],
});