Screen: isExtended property
Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.
The isExtended
read-only property of the
Screen
interface returns true
if the user's device has multiple screens, and false
if not.
This property is typically accessed via window.screen.isExtended
, and can be used to test whether multiple screens are available before attempting to create a multi-window, multi-screen layout using the Window Management API.
Value
A boolean value — true
if the device has multiple screens, and false
if not.
Note: If a window-management
Permissions-Policy is set that blocks use the Window Management API, isExtended
will always return false
.
Examples
if (window.screen.isExtended) {
// Create multi-screen window layout
} else {
// Create single-screen window layout
}
Specifications
Specification |
---|
Window Management # api-screen-isExtended-attribute |
Browser compatibility
BCD tables only load in the browser