Detecting the opening or closing of a details element

How can I detect when a details element is opened or closed in Javascript? Other than attaching a listener to the click function and checking if the open attribute is set or not.

Answers:

Answer

You can do something like this:

<details id="element">
   <p>Details</p>
</details>

<script>
   var isOpen = ($("#element").attr("open") == "open");

   alert ("Open = " + isOpen);
</script>
Answer

You can use the toggle event:

var details = document.querySelector("details")

details.addEventListener("toggle", function() {
 details.firstChild.textContent = "done"
})
<!doctype html>
<details>
 <summary>toggle event</summary>
</details>

Answer

In jQuery you can catch the event using .on('toggle') like this:

$('#detail-id').on('toggle', function() {
   //code
});

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