WorkerGlobalScope: self property - Web APIs | MDN (original) (raw)

Note: This feature is only available in Web Workers.

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

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() {} 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

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See also