I guess this is what they call a classy website

<html class="js sizes applicationcache cookies geolocation history json notification postmessage svg websockets cssescape supports target localstorage sessionstorage websqldatabase svgfilters webworkers svgasimg hashchange inputsearchevent pointerevents audio canvas canvastext video webgl adownload bgpositionshorthand csscalc cubicbezierrange cssgradients multiplebgs opacity csspointerevents no-regions cssremunit rgba preserve3d hidden no-capture fileinput fileinputdirectory formattribute placeholder sandbox no-seamless srcset scriptdefer scriptasync inlinesvg textareamaxlength csschunit cssexunit hsla svgclippaths svgforeignobject smil mediaqueries no-hiddenscroll checked displaytable display-table fontface generatedcontent cssinvalid lastchild nthchild cssscrollbar siblinggeneral no-subpixelfont cssvalid cssvhunit cssvmaxunit cssvminunit cssvwunit formvalidation textshadow indexeddb indexeddb-deletedatabase requestanimationframe raf backgroundblendmode objectfit object-fit no-wrapflow cssanimations csspseudoanimations backgroundcliptext bgpositionxy bgrepeatround bgrepeatspace backgroundsize bgsizecover borderimage borderradius boxshadow boxsizing csscolumns csscolumns-width csscolumns-span csscolumns-fill csscolumns-gap csscolumns-rule csscolumns-rulecolor csscolumns-rulestyle csscolumns-rulewidth csscolumns-breakbefore csscolumns-breakafter csscolumns-breakinside ellipsis cssfilters flexbox flexwrap cssmask no-overflowscrolling cssreflections cssresize shapes textalignlast csstransforms csstransforms3d csstransitions csspseudotransitions userselect no-apng desktop landscape no-touchevents">

Holy shit !