WindowOrWorkerGlobalScope.crossOriginIsolated

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

Browser compatibility

See also

• Service Workers
• Web Workers