DrS*_*ove 6 html javascript css
我通过Google Developer Tools找到了此代码:
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" class=" js canvas canvastext geolocation crosswindowmessaging websqldatabase no-indexeddb hashchange historymanagement draganddrop websockets rgba hsla multiplebgs backgroundsize borderimage borderradius boxshadow opacity cssanimations csscolumns cssgradients cssreflections csstransforms no-csstransforms3d csstransitions video audio localstorage sessionstorage webworkers applicationcache svg smil svgclippaths no-opera no-mozilla webkit fontface">
</html>
这段代码通过html源代码:
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> </html>
显然这些类是用Javascript生成的.但为什么？为什么这么多的hss根元素的CSS类？