2 id невалидно

dabblet.css

body
{
	font-size: 24px
}

#myid
{
	color: red;
}

.myclass
{
	color: green /* применился ко всем */
}

#myid2.myclass
{
	font-weight: bold;
}

.myclass.mysuperclass
{
	text-decoration: underline;
}

#myid3.myclass.mysuperclass
{
	font-style: italic;
}

/* 2 id невалидно */
#myid4#mysuperid.myclass.mysuperclass
{
	background: yellow;
}

dabblet.html

<div id="myid">текст</div>
<div class="myclass">текст</div>
<div id="myid2" class="myclass">текст</div>
<div id="myid3" class="myclass mysuperclass">текст</div>
<div id="myid4 mysupperid" class="myclass mysuperclass">текст</div>

settings.json

{"view":"separate","fontsize":"100","seethrough":"","prefixfree":"1","page":"all"}