ToggleEvent: oldState property
The oldState
read-only property of the ToggleEvent
interface is a string representing the state the element is transitioning from.
Value
A string. Possible values are "open"
(the popover is going from showing to hidden) or "closed"
(the popover going from hidden to shown).
Examples
js
const popover = document.getElementById("mypopover");
// ...
popover.addEventListener("beforetoggle", (event) => {
if (event.oldState === "open") {
console.log("Popover is being hidden");
} else {
console.log("Popover is being shown");
}
});
Specifications
Specification |
---|
HTML Standard # dom-toggleevent-oldstate |
Browser compatibility
BCD tables only load in the browser