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<!DOCTYPE html>
<meta charset="utf-8">
<style>
#test {
color: red;
}
/* Adding/removing the green-class on #test should refresh the rule-view when #test is
selected */
#test.green-class {
color: green;
}
/* Adding/removing the purple-class on #parent should refresh the rule-view when #test is
selected */
#parent.purple-class #test {
color: purple;
}
/* Adding/removing the blue-class on #sibling should refresh the rule-view when #test is
selected*/
#sibling.blue-class + #test {
color: blue;
}
</style>
<div id="parent">
<div>
<div id="sibling"></div>
<div id="test">test</div>
</div>
</div>