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ToggleEvent - Web APIs | MDN
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ToggleEvent
Baseline
2023
Newly available
Since November 2023, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
The ToggleEvent interface represents an event notifying the user an Element's state has changed.
This is the event object for the HTMLElement beforetoggle and toggle events, which fire on some elements just before and just after they transition between showing and hidden, respectively.
Constructor
ToggleEvent()-
Creates an
ToggleEventobject.
Instance properties
This interface inherits properties from its parent, Event.
ToggleEvent.newStateRead only-
A string (either
"open"or"closed"), representing the state the element is transitioning to. ToggleEvent.oldStateRead only-
A string (either
"open"or"closed"), representing the state the element is transitioning from. ToggleEvent.sourceExperimental Read only-
An
Elementobject instance representing the HTML control that initiated the toggle.
Examples
Basic example
js
const popover = document.getElementById("mypopover");
// …
popover.addEventListener("beforetoggle", (event) => {
if (event.newState === "open") {
console.log("Popover is being shown");
} else {
console.log("Popover is being hidden");
}
});
Specifications
| Specification |
|---|
| HTML # toggleevent |
Browser compatibility
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