hx-push-url

<form action="/sample/demo.html" method="POST"
hx-post="/sample/demo.html"
hx-swap="innerHTML"
hx-trigger="submit"
hx-target="#result-url"
hx-push-url="true">
<input type="submit" name="submit" value="demo">
</form>
<div id="result-url" class="demo">このコンテンツが変わります</div>