Every developer knows <input>. It’s the workhorse of the web. But <output>? Most have never touched it. Some don’t even know it exists. That’s a shame, because it solves something we’ve been cobbling together with <div>s and ARIA for years: dynamic results that are announced to screen readers by default. It’s been in the spec for years. Yet it’s hiding in plain sight. Here’s what the HTML5 spec sa