ToggleEvent: oldState property

Baseline 2024

Newly available

Since April 2024, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

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

See also

Popover API