3 #before::before, #after::after { content: attr(my-value) }
5 <p>You should see two PASSes below.</p>
6 <div id="before">SS</div>
7 <div id="after">PA</div>
9 document.body.offsetTop; // force layout
11 before.setAttribute("my-value", "PA");
12 after.setAttribute("my-value", "SS");