WorkerGlobalScope.self
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since 2015年7月.
self 是 WorkerGlobalScope 的只读属性，它指向 WorkerGlobalScope 自身。通常情况下，它是如 DedicatedWorkerGlobalScope, SharedWorkerGlobalScope, 或 ServiceWorkerGlobalScope 类型的 scope。
语法
js
var selfRef = self;
值
当前 worker 的全局 scope（值取决于你创建的 worker 类型）。
示例
在 worker 中运行这行代码：
js
console.log(self);
console 中会输出当前 worker 的全局 scope，如下所示：
js
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.
这会列出当前 worker scope 上完整的属性列表，在需要检测某个属性是否可用时非常有用。详细列表也可查阅 Functions and classes available to Web Workers.
规范
| Specification |
|---|
| HTML # dom-workerglobalscope-self-dev |
浏览器兼容性
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参见
WorkerGlobalScope