OffscreenCanvas: add typeof check. Update docs

alemart · Dec 11, 2023 · a86aa7c · a86aa7c
1 parent 38641df
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Showing 2 changed files with 5 additions and 5 deletions.
diff --git a/README.md b/README.md
@@ -235,13 +235,13 @@ A `SpeedyMedia` object encapsulates a media object: an image, a video, a canvas
 
 ##### Speedy.load()
 
-`Speedy.load(source: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap, options?: object): SpeedyPromise<SpeedyMedia>`
+`Speedy.load(source: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap, options?: object): SpeedyPromise<SpeedyMedia>`
 
 Tells Speedy to load `source`. The `source` parameter may be an image, a video, a canvas or a bitmap.
 
 ###### Arguments
 
-* `source: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap`. The media source.
+* `source: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap`. The media source.
 * `options: object, optional`. Additional options for advanced configuration. See [SpeedyMedia.options](#speedymediaoptions) for details.
 
 ###### Returns
@@ -319,7 +319,7 @@ Returns `null`.
 
 ##### SpeedyMedia.source
 
-`SpeedyMedia.source: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | ImageBitmap, read-only`
+`SpeedyMedia.source: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap, read-only`
 
 The media source associated with the `SpeedyMedia` object.
 

diff --git a/src/core/speedy-media-source.js b/src/core/speedy-media-source.js
@@ -24,7 +24,7 @@ import { SpeedyPromise } from './speedy-promise';
 import { AbstractMethodError, IllegalArgumentError, IllegalOperationError, TimeoutError, ResourceNotLoadedError } from '../utils/errors';
 import { MediaType } from '../utils/types'
 
-/** @typedef {HTMLImageElement|HTMLVideoElement|HTMLCanvasElement|ImageBitmap} SpeedyMediaSourceNativeElement */
+/** @typedef {HTMLImageElement|HTMLVideoElement|HTMLCanvasElement|OffscreenCanvas|ImageBitmap} SpeedyMediaSourceNativeElement */
 
 /** Internal token for protected constructors */
 const PRIVATE_TOKEN = Symbol();
@@ -64,7 +64,7 @@ export class SpeedyMediaSource
             return SpeedyVideoMediaSource.load(wrappedObject);
         else if(wrappedObject instanceof HTMLCanvasElement)
             return SpeedyCanvasMediaSource.load(wrappedObject);
-        else if(wrappedObject instanceof OffscreenCanvas)
+        else if(typeof OffscreenCanvas !== 'undefined' && wrappedObject instanceof OffscreenCanvas)
             return SpeedyOffscreenCanvasMediaSource.load(wrappedObject);
         else if(wrappedObject instanceof ImageBitmap)
             return SpeedyBitmapMediaSource.load(wrappedObject);