Share a CSS effect code that makes the whole station grayed out

Share a CSS effect code to make the whole station gray, small program, special to share the following

Full-station grayed-out CSS code compatible with mainstream browsers:

1. HTML {     -webkit-filter:grayscale (100%);    -moz-filter:grayscale (100%);    -ms-filter:grayscale (100%);    -o-filter:grayscale (100%);    Filter:url ("Data:image/svg+xml;utf8,<svg xmlns= ' http://www.w3.org/2000/svg ' ><filter id= ' grayscale ' >  <fecolormatrix type= ' matrix '  values= ' 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0 '/></filter></svg> #grayscalerayscale ");    Filter:progid:DXImageTransform.Microsoft.BasicImage (grayscale=1); Zoom:1;}

There are also JS grayed out codes available:
Grayscale (document.body);
Grayscale.js please search by yourself.

HTML {    -webkit-filter:grayscale (100%);    Filter:grayscale (100%);    Filter:url (Desaturate.svg#grayscale);    Filter:progid:DXImageTransform.Microsoft.BasicImage (grayscale=1);}