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The WindowOrWorkerGlobalScope mixin describes several features common to the Window and WorkerGlobalScope interfaces. Each of these interfaces can, of course, add more features in addition to the ones listed below.
Note: WindowOrWorkerGlobalScope is a mixin and not an interface; you can't actually create an object of type WindowOrWorkerGlobalScope.
Properties
These properties are defined on the WindowOrWorkerGlobalScope mixin, and implemented by Window and WorkerGlobalScope.
WindowOrWorkerGlobalScope.caches読取専用- Returns the
CacheStorageobject associated with the current context. This object enables functionality such as storing assets for offline use, and generating custom responses to requests. WindowOrWorkerGlobalScope.indexedDB読取専用- Provides a mechanism for applications to asynchronously access capabilities of indexed databases; returns an
IDBFactoryobject. WindowOrWorkerGlobalScope.isSecureContext読取専用- Returns a boolean indicating whether the current context is secure (
true) or not (false). WindowOrWorkerGlobalScope.origin読取専用- Returns the origin of the global scope, serialized as a string.
Methods
These properties are defined on the WindowOrWorkerGlobalScope mixin, and implemented by 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
Promisewhich resolves to anImageBitmap. 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.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.
Specifications
| Specification | Status | Comment |
|---|---|---|
HTML Living StandardWindowOrWorkerGlobalScope mixin の定義 |
現行の標準 | This is where the main mixin is defined. |
| Fetch fetch() の定義 |
現行の標準 | Definition of the fetch() method. |
| Service Workers caches の定義 |
草案 | Definition of the caches property. |
| Indexed Database API 2.0 indexedDB の定義 |
勧告 | Definition of the indexedDB property. |
| Secure Contexts isSecureContext の定義 |
勧告候補 | Definition of the isSecureContext property. |
Browser compatibility
現在、互換性データを可読形式の JSON フォーマットに置き換えているところです。 この互換性一覧は古い形式を使っており、これに含まれるデータの置き換えが済んでいません。 手助けしていただける場合は、こちらから！
| Feature | Firefox (Gecko) | Chrome | Edge | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | 52 (52) | 54 | ? | ? | ? | ? |
origin |
54 (54) | 59 | ? | ? | ? | ? |
| Feature | Android Webview | Edge | Firefox Mobile (Gecko) | Android | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | ? | ? | 52.0 (52) | ? | ? | ? | ? | 54 |
origin |
? | ? | 54.0 (54) | ? | ? | ? | ? | 59 |