WorkerGlobalScope.self - Web API 接口参考 编辑

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

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：

console.log(self);

console 中会输出当前 worker 的全局 scope，如下所示：

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	Status	Comment
HTML Living Standard self	Living Standard

兼容性

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参见

WorkerGlobalScope