WindowOrWorkerGlobalScope.crossOriginIsolated

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The crossOriginIsolated read-only property of the WindowOrWorkerGlobalScope interface returns a boolean value that indicates whether a SharedArrayBuffer can be sent via a Window.postMessage() call.

This value is dependant on any Cross-Origin-Opener-Policy and Cross-Origin-Embedder-Policy headers present in the response.

Syntax

var myCrossOriginIsolated = self.crossOriginIsolated; // or just crossOriginIsolated

Value

A boolean value

Examples

if(crossOriginIsolated) {
  // Post SharedArrayBuffer
} else {
  // Do something else
}

Specifications

Specification Status Comment
HTML Living Standard Not yet merged into the spec

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
crossOriginIsolated
ExperimentalNon-standard
Chrome No support NoEdge No support NoFirefox Full support 72IE No support NoOpera No support NoSafari No support NoWebView Android No support NoChrome Android No support NoFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android No support No

Legend

Full support  
Full support
No support  
No support
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.
Non-standard. Expect poor cross-browser support.

See also