The read-only userActivation property of the Navigator interface returns a UserActivation object which contains information about the current window's user activation state.

A UserActivation object.

Use UserActivation.isActive to check whether the user is currently interacting with the page (Transient activation).

if (navigator.userActivation.isActive) {
  // proceed to request playing media, for example
}

Use UserActivation.hasBeenActive to check whether the user has ever interacted with the page (Sticky activation).

if (navigator.userActivation.hasBeenActive) {
  // proceed with auto-playing an animation, for example
}

• UserActivation
• UserActivation.hasBeenActive
• UserActivation.isActive
• Features gated by user activation