The hx-select attribute allows you to select the content you want swapped from a response. The value of this attribute is a CSS query selector of the element or elements to select from the response.

Here is an example that selects a subset of the response content:

    <button hx-get="/info" hx-select="#info-details" hx-swap="outerHTML">
        Get Info!

So this button will issue a GET to /info and then select the element with the id info-detail, which will replace the entire button in the DOM.