在此页

• 特性
• 方法
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

WindowOrWorkerGlobalScope mixin describes several features common to the Window and WorkerGlobalScope 接口。 Each of these interfaces can, of course, add more features in addition to the ones listed below.

注意 : WindowOrWorkerGlobalScope is a mixin and not an interface; you can't actually create an object of type WindowOrWorkerGlobalScope .

特性

These properties are defined on the WindowOrWorkerGlobalScope 混合，和实现通过 Window and WorkerGlobalScope .

WindowOrWorkerGlobalScope.caches 只读

返回 CacheStorage object associated with the current context. This object enables functionality such as storing assets for offline use, and generating custom responses to requests.

WindowOrWorkerGlobalScope.crossOriginIsolated 只读

Returns a boolean value that indicates whether a SharedArrayBuffer can be sent via a Window.postMessage() 调用。

WindowOrWorkerGlobalScope.indexedDB 只读

Provides a mechanism for applications to asynchronously access capabilities of indexed databases; returns an IDBFactory 对象。

WindowOrWorkerGlobalScope.isSecureContext 只读

Returns a boolean indicating whether the current context is secure ( true ) 或不 ( false ).

WindowOrWorkerGlobalScope.origin 只读

Returns the origin of the global scope, serialized as a string.

方法

These methods are defined on the WindowOrWorkerGlobalScope 混合，和实现通过 Window and WorkerGlobalScope .

WindowOrWorkerGlobalScope.atob()

Decodes a string of data which has been encoded using base-64 encoding.

WindowOrWorkerGlobalScope.btoa()

Creates a base-64 encoded ASCII string from a string of binary data.

WindowOrWorkerGlobalScope.clearInterval()

Cancels the repeated execution set using WindowOrWorkerGlobalScope.setInterval() .

WindowOrWorkerGlobalScope.clearTimeout()

Cancels the delayed execution set using WindowOrWorkerGlobalScope.setTimeout() .

WindowOrWorkerGlobalScope.createImageBitmap()

Accepts a variety of different image sources, and returns a Promise which resolves to an ImageBitmap . Optionally the source is cropped to the rectangle of pixels originating at ( sx , sy ) with width sw , and height sh .

WindowOrWorkerGlobalScope.fetch()

Starts the process of fetching a resource from the network.

WindowOrWorkerGlobalScope.queueMicrotask()

Enqueues a microtask—a short function to be executed after execution of the JavaScript code completes and control isn't being returned to a JavaScript caller, but before handling callbacks and other tasks. This lets your code run without interfering with other, possibly higher priority, code, but before the browser runtime regains control, potentially depending upon the work you need to complete.

WindowOrWorkerGlobalScope.setInterval()

Schedules a function to execute every time a given number of milliseconds elapses.

WindowOrWorkerGlobalScope.setTimeout()

Schedules a function to execute in a given amount of time.

规范

规范	状态	注释
HTML 实时标准 The definition of ' WindowOrWorkerGlobalScope mixin' in that specification.	实时标准	This is where the main mixin is defined.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	桌面						移动
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
WindowOrWorkerGlobalScope	Chrome 4	Edge 12	Firefox 1	IE Yes	Opera Yes	Safari Yes	WebView Android Yes	Chrome Android 18	Firefox Android 4	Opera Android Yes	Safari iOS Yes	Samsung Internet Android 1.0
atob	Chrome 4	Edge 12	Firefox 1 1 27 atob() ignores all space characters in the argument to comply with the latest HTML5 spec (see bug 711180 ). 57 atob() now defined on WindowOrWorkerGlobalScope 混合。	IE 10	Opera 10.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4 4 27 atob() ignores all space characters in the argument to comply with the latest HTML5 spec (see bug 711180 ). 57 atob() now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 11	Safari iOS 1	Samsung Internet Android 1.0
btoa	Chrome 4	Edge 12	Firefox 1 1 52 btoa() now defined on WindowOrWorkerGlobalScope 混合。	IE 10	Opera 10.5	Safari 3	WebView Android ≤37	Chrome Android 18	Firefox Android 4 4 52 atob() now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 11	Safari iOS 1	Samsung Internet Android 1.0
caches	Chrome 40	Edge ≤79	Firefox 42 42 52 caches now defined on WindowOrWorkerGlobalScope 混合。	IE No	Opera ?	Safari No	WebView Android Yes	Chrome Android Yes	Firefox Android 42 42 52 caches now defined on WindowOrWorkerGlobalScope 混合。	Opera Android Yes	Safari iOS Yes	Samsung Internet Android Yes
clearInterval	Chrome 4	Edge 12	Firefox 1 1 52 clearInterval() now defined on WindowOrWorkerGlobalScope 混合。	IE 4 4 From Internet Explorer 4 through 8, clearInterval is an Object rather than a Function. This behavior was fixed in Internet Explorer 9.	Opera 4	Safari 4	WebView Android 1	Chrome Android 18	Firefox Android 4 4 52 clearInterval() now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 1.0
clearTimeout	Chrome 45	Edge 12	Firefox 1 1 52 clearTimeout() now defined on WindowOrWorkerGlobalScope 混合。	IE 4 4 From Internet Explorer 4 through 8, clearTimeout is an Object rather than a Function. This behavior was fixed in Internet Explorer 9.	Opera 4	Safari 4	WebView Android 45	Chrome Android 45	Firefox Android 4 4 52 clearTimeout() now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 5.0
createImageBitmap	Chrome 50	Edge 79	Firefox 52 52 createImageBitmap() now defined on WindowOrWorkerGlobalScope 混合。 42	IE No	Opera Yes	Safari No	WebView Android 50	Chrome Android 50	Firefox Android Yes	Opera Android Yes	Safari iOS ?	Samsung Internet Android 5.0
crossOriginIsolated 非标	Chrome No	Edge No	Firefox 72	IE No	Opera No	Safari No	WebView Android No	Chrome Android No	Firefox Android No	Opera Android No	Safari iOS No	Samsung Internet Android No
fetch	Chrome 42	Edge 14	Firefox 39 39 34 Disabled Disabled From version 34: this feature is behind the dom.fetch.enable preference. To change preferences in Firefox, visit about:config. 52 fetch() now defined on WindowOrWorkerGlobalScope 混合。	IE No	Opera 29 29 28 Disabled Disabled From version 28: this feature is behind the Experimental Web Platform Features preference.	Safari 10.1	WebView Android 42	Chrome Android 42	Firefox Android 39 39 34 Disabled Disabled From version 34: this feature is behind the dom.fetch.enable preference. To change preferences in Firefox, visit about:config. 52 fetch() now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 29 29 28 Disabled Disabled From version 28: this feature is behind the Experimental Web Platform Features preference.	Safari iOS 10.3	Samsung Internet Android 4.0
indexedDB	Chrome 24	Edge 12	Firefox 16 16 10 Prefixed Prefixed Implemented with the vendor prefix: moz 52 indexedDB now defined on WindowOrWorkerGlobalScope 混合。	IE 部分支持 10	Opera 15	Safari 7	WebView Android Yes	Chrome Android 25	Firefox Android 22 22 52 indexedDB now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 14	Safari iOS 8	Samsung Internet Android 2.0
isSecureContext	Chrome 55	Edge ≤79	Firefox 52	IE ?	Opera ?	Safari ?	WebView Android 55	Chrome Android 55	Firefox Android 52	Opera Android ?	Safari iOS ?	Samsung Internet Android 6.0
origin	Chrome 59	Edge ≤79	Firefox 54	IE No	Opera No	Safari No	WebView Android 59	Chrome Android 59	Firefox Android 54	Opera Android No	Safari iOS No	Samsung Internet Android 7.0
queueMicrotask	Chrome 71	Edge 79	Firefox 69	IE No	Opera 58	Safari 12.1	WebView Android 71	Chrome Android 71	Firefox Android No	Opera Android 50	Safari iOS 12.2	Samsung Internet Android 10.0
setInterval	Chrome 30	Edge 12	Firefox 1 1 52 setInterval now defined on WindowOrWorkerGlobalScope 混合。	IE 4	Opera 4	Safari 1	WebView Android 4.4	Chrome Android 30	Firefox Android 4 4 52 setInterval now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 3.0
setTimeout	Chrome 30	Edge 12	Firefox 1 1 52 setInterval now defined on WindowOrWorkerGlobalScope 混合。	IE 4	Opera 4	Safari 1	WebView Android 4.4	Chrome Android 30	Firefox Android 4 4 52 setInterval now defined on WindowOrWorkerGlobalScope 混合。	Opera Android 10.1	Safari iOS 1	Samsung Internet Android 3.0

图例

完整支持

完整支持

部分支持

部分支持

不支持

不支持

兼容性未知 ?

兼容性未知

实验。期望将来行为有所改变。

实验。期望将来行为有所改变。

非标。预期跨浏览器支持较差。

非标。预期跨浏览器支持较差。

见实现注意事项。

用户必须明确启用此特征。

用户必须明确启用此特征。

要求使用供应商前缀或不同名称。

要求使用供应商前缀或不同名称。

另请参阅

• Window
• WorkerGlobalScope

元数据

• 最后修改： Feb 22, 2020

相关话题

1. WindowOrWorkerGlobalScope
2. 特性

   1. caches
   2. crossOriginIsolated
   3. indexedDB
   4. isSecureContext
   5. origin
3. 方法

   1. atob()
   2. btoa()
   3. clearInterval()
   4. clearTimeout()
   5. createImageBitmap()
   6. fetch()
   7. queueMicrotask()
   8. setInterval()
   9. setTimeout()
4. 实现通过：

   1. Window
   2. WorkerGlobalScope