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

A boolean value

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

Specification	Status	Comment
HTML Living Standard The definition of '`crossOriginIsolated`' in that specification.	Living Standard	Initial definition.

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