WorkerGlobalScope: self property

The self read-only property of the WorkerGlobalScope interface returns a reference to the WorkerGlobalScope itself. Most of the time it is a specific scope like DedicatedWorkerGlobalScope, SharedWorkerGlobalScope, or ServiceWorkerGlobalScope.

Value

A global scope object (differs depending on the type of worker you are dealing with, as indicated above).

Examples

If you called

console.log(self);

inside a worker, you will get a worker global scope of the same type as that worker object written to the console — something like the following:

DedicatedWorkerGlobalScope {
undefined: undefined, Infinity: Infinity, Math: MathConstructor, NaN: NaN, Intl: Object...}
 Infinity: Infinity
 Array: function Array() { [native code] }
 arguments: null
 caller: null
 isArray: function isArray() { [native code] }
 length: 1
 name: "Array"
 observe: function observe() { [native code] }
 prototype: Array[0]
 unobserve: function unobserve() { [native code] }
 __proto__: function Empty() {}
 <function scope>
 ArrayBuffer: function ArrayBuffer() { [native code] }
 Blob: function Blob() { [native code] }
 Boolean: function Boolean() { [native code] }
 DataView: function DataView() { [native code] }
 Date: function Date() { [native code] }
 DedicatedWorkerGlobalScope: function DedicatedWorkerGlobalScope() { [native code] }
 Error: function Error() { [native code] }
// etc. etc.

This provides a full list of the objects available to that worker scope, so it is quite a useful test if you want to see whether something is available to your worker or not. We also maintain a list of Functions and classes available to Web Workers.

Specifications

Browser compatibility

See also