<div class="${a}"/>
<div class="${a} ${b}"/>
<div class={ a: "${b}" }/>
<div class={ a: "${b} ${c}" }/>
<test value="${a}"/>
<test value="${a} ${b}"/>
<test value={ a: "${b}" }/>
<test value={ a: "${b} ${c}" }/>
<test class="something
  ${data.first ? ' first' : ''}
  ${data.last ? ' last' : ''}"/>