I'm not an expert on either of those, but I don't think that your ERB version does the same thing. If delta is not set, the react version renders something lik

I'm not an expert on either of those, but I don't think that your ERB version does the same thing. If delta is not set, the react version renders something like <div class="card"> title </div> If it is set, it renders something like <div class="card"> <strong class="text-success"> delta </strong> title </div> Your version appears to render <div class="card"> <strong class="text-success"> title </strong> </div>