add another input for the polyfill demo (with a default value)
add another input for the polyfill demo (with a default value)

armanforghani/spectrum,kotmatpockuh/spectrum,GerHobbelt/spectrum,c9s/spectrum,CodeLoversAt/spectrum,ginlime/spectrum,Rise-Vision/spectrum,armanforghani/spectrum,baiyanghese/slides-spectrum,bgrins/spectrum,shawinder/spectrum,maurojs25/spectrum,GerHobbelt/spectrum,hakimel/slides-spectrum,ajssd/spectrum,ginlime/spectrum,shawinder/spectrum,liitii/spectrum,inscriptionweb/spectrum,maurojs25/spectrum,safareli/spectrum,safareli/spectrum,inscriptionweb/spectrum,bgrins/spectrum,kotmatpockuh/spectrum,liitii/spectrum,ajssd/spectrum