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.
WorkerGlobalScope.self
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
| Specification |
|---|
| HTML Standard # dom-workerglobalscope-self-dev |
Browser compatibility
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
self |
4
|
12
|
3.5
|
10
|
11.5
|
4
|
4.4
|
40
|
34
|
27
|
5
|
4.0
|
See also
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/WorkerGlobalScope/self
