Using Hex numbers in Selectors

Selectors and attributes names can be written HEX mumbers entirely.
See console...

".\0031 a" is valid but ".\0031a" is not becuase "a" can be interpreted as a hex number.
Both ".\0031 x" and ".\0031x" are valid because there is no way to interpret "x" as a hex number.

You can also use hex number to write "::before", "::after", "content"



#test{
	--vvv:"A";
}
#test::before{
	content:var(--vvv);
}

...can be written as...

#\74\65\73\74{
	\2d\2d\76\76\76:"\41"
}
#\74\65\73\74::\62\65\66\6f\72\65 {
	\63\6f\6e\74\65\6e\74:\76\61\72(\2d\2d\76\76\76);
}