ToggleEvent: newState property

Baseline 2025
Newly available

Since January 2025, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The newState read-only property of the ToggleEvent interface is a string representing the state the element is transitioning to.

Value

A string. Possible values are "open" (the popover is being shown) or "closed" (the popover is being hidden).

Examples

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
# dom-toggleevent-newstate

Browser compatibility

BCD tables only load in the browser

See also