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fix: SharedWorker not working on some mobile browsers (#336)
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,214 @@ | ||
| // Copy from https://github.com/okikio/sharedworker/blob/31830ea0f1f4b1d1cf1444aee7fb1ffd832f63e3/src/index.ts, which is licensed under the MIT license. | ||
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| // Adapted from https://github.com/okikio/bundle/blob/main/src/ts/util/WebWorker.ts, which is licensed under the MIT license. | ||
| // If the above file is removed or modified, you can access the original state in the following GitHub Gist: https://gist.github.com/okikio/6809cfc0cdbf1df4c0573addaaf7e259 | ||
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| /** | ||
| * A polyfill class for `SharedWorker`, it accepts a URL/string as well as any other options the spec. allows for `SharedWorker`. It supports all the same methods and properties as the original, except it adds compatibility methods and properties for older browsers that don't support `SharedWorker`, so, it can switch to normal `Workers` instead. | ||
| */ | ||
| export class SharedWorkerPolyfill | ||
| implements SharedWorker, EventTarget, AbstractWorker | ||
| { | ||
| /** | ||
| * The actual worker that is used, depending on browser support it can be either a `SharedWorker` or a normal `Worker`. | ||
| */ | ||
| public ActualWorker: SharedWorker | Worker | ||
| constructor(url: string | URL, opts?: WorkerOptions) { | ||
| if ('SharedWorker' in window) { | ||
| this.ActualWorker = new SharedWorker(url, opts) | ||
| } else { | ||
| this.ActualWorker = new Worker(url, opts) | ||
| } | ||
| } | ||
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| /** | ||
| * An EventListener called when MessageEvent of type message is fired on the port—that is, when the port receives a message. | ||
| */ | ||
| public get onmessage() { | ||
| if ('SharedWorker' in window) { | ||
| return (this.ActualWorker as SharedWorker)?.port.onmessage | ||
| } else { | ||
| return (this.ActualWorker as Worker) | ||
| .onmessage as unknown as MessagePort['onmessage'] | ||
| } | ||
| } | ||
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| public set onmessage(value: MessagePort['onmessage'] | Worker['onmessage']) { | ||
| if ('SharedWorker' in window) { | ||
| ;(this.ActualWorker as SharedWorker).port.onmessage = | ||
| value as MessagePort['onmessage'] | ||
| } else { | ||
| ;(this.ActualWorker as Worker).onmessage = value as Worker['onmessage'] | ||
| } | ||
| } | ||
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| /** | ||
| * An EventListener called when a MessageEvent of type MessageError is fired—that is, when it receives a message that cannot be deserialized. | ||
| */ | ||
| public get onmessageerror() { | ||
| if ('SharedWorker' in window) { | ||
| return (this.ActualWorker as SharedWorker)?.port.onmessageerror | ||
| } else { | ||
| return (this.ActualWorker as Worker).onmessageerror | ||
| } | ||
| } | ||
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| public set onmessageerror( | ||
| value: MessagePort['onmessageerror'] | Worker['onmessageerror'], | ||
| ) { | ||
| if ('SharedWorker' in window) { | ||
| ;(this.ActualWorker as SharedWorker).port.onmessageerror = | ||
| value as MessagePort['onmessageerror'] | ||
| } else { | ||
| ;(this.ActualWorker as Worker).onmessageerror = | ||
| value as Worker['onmessageerror'] | ||
| } | ||
| } | ||
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| /** | ||
| * Starts the sending of messages queued on the port (only needed when using EventTarget.addEventListener; it is implied when using MessagePort.onmessage.) | ||
| */ | ||
| public start() { | ||
| if ('SharedWorker' in window) { | ||
| return (this.ActualWorker as SharedWorker)?.port.start() | ||
| } | ||
| } | ||
|
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| /** | ||
| * Clones message and transmits it to worker's global environment. transfer can be passed as a list of objects that are to be transferred rather than cloned. | ||
| */ | ||
| public postMessage( | ||
| message: any, | ||
| transfer?: Transferable[] | StructuredSerializeOptions, | ||
| ) { | ||
| if ('SharedWorker' in window) { | ||
| return (this.ActualWorker as SharedWorker)?.port.postMessage( | ||
| message, | ||
| transfer as Transferable[], | ||
| ) | ||
| } else { | ||
| return (this.ActualWorker as Worker).postMessage( | ||
| message, | ||
| transfer as Transferable[], | ||
| ) | ||
| } | ||
| } | ||
|
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| /** | ||
| * Immediately terminates the worker. This does not let worker finish its operations; it is halted at once. ServiceWorker instances do not support this method. | ||
| */ | ||
| public terminate() { | ||
| if ('SharedWorker' in window) { | ||
| return (this.ActualWorker as SharedWorker)?.port.close() | ||
| } else { | ||
| return (this.ActualWorker as Worker).terminate() | ||
| } | ||
| } | ||
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| /** | ||
| * Disconnects the port, so it is no longer active. | ||
| */ | ||
| public close() { | ||
| return this.terminate() | ||
| } | ||
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| /** | ||
| * Returns a MessagePort object used to communicate with and control the shared worker. | ||
| */ | ||
| public get port() { | ||
| return ( | ||
| 'SharedWorker' in window | ||
| ? (this.ActualWorker as SharedWorker).port | ||
| : this.ActualWorker | ||
| ) as MessagePort | ||
| } | ||
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||
| /** | ||
| * Is an EventListener that is called whenever an ErrorEvent of type error event occurs. | ||
| */ | ||
| public get onerror() { | ||
| return this.ActualWorker.onerror | ||
| } | ||
| public set onerror( | ||
| value: ((this: AbstractWorker, ev: ErrorEvent) => any) | null, | ||
| ) { | ||
| this.ActualWorker.onerror = value | ||
| } | ||
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| /** | ||
| * Registers an event handler of a specific event type on the EventTarget | ||
| */ | ||
| public addEventListener<K extends keyof WorkerEventMap>( | ||
| type: K, | ||
| listener: (this: Worker, ev: WorkerEventMap[K]) => any, | ||
| options?: boolean | AddEventListenerOptions, | ||
| ): void | ||
| public addEventListener( | ||
| type: string, | ||
| listener: EventListenerOrEventListenerObject, | ||
| options?: boolean | AddEventListenerOptions, | ||
| ): void | ||
| public addEventListener<K extends keyof MessagePortEventMap>( | ||
| type: K, | ||
| listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, | ||
| options?: boolean | AddEventListenerOptions, | ||
| ): void | ||
| public addEventListener( | ||
| type: string, | ||
| listener: EventListenerOrEventListenerObject, | ||
| options?: boolean | AddEventListenerOptions, | ||
| ): void { | ||
| if ('SharedWorker' in window && type !== 'error') { | ||
| return (this.ActualWorker as SharedWorker)?.port.addEventListener( | ||
| type, | ||
| listener, | ||
| options, | ||
| ) | ||
| } else { | ||
| return this.ActualWorker.addEventListener(type, listener, options) | ||
| } | ||
| } | ||
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| /** | ||
| * Removes an event listener from the EventTarget. | ||
| */ | ||
| public removeEventListener<K extends keyof WorkerEventMap>( | ||
| type: K, | ||
| listener: (this: Worker, ev: WorkerEventMap[K]) => any, | ||
| options?: boolean | EventListenerOptions, | ||
| ): void | ||
| public removeEventListener( | ||
| type: string, | ||
| listener: EventListenerOrEventListenerObject, | ||
| options?: boolean | EventListenerOptions, | ||
| ): void | ||
| public removeEventListener<K extends keyof MessagePortEventMap>( | ||
| type: K, | ||
| listener: (this: MessagePort, ev: MessagePortEventMap[K]) => any, | ||
| options?: boolean | EventListenerOptions, | ||
| ): void | ||
| public removeEventListener( | ||
| type: string, | ||
| listener: EventListenerOrEventListenerObject, | ||
| options?: boolean | EventListenerOptions, | ||
| ): void { | ||
| if ('SharedWorker' in window && type !== 'error') { | ||
| return (this.ActualWorker as SharedWorker)?.port.removeEventListener( | ||
| type, | ||
| listener, | ||
| options, | ||
| ) | ||
| } else { | ||
| return this.ActualWorker.removeEventListener(type, listener, options) | ||
| } | ||
| } | ||
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| /** | ||
| * Dispatches an event to this EventTarget. | ||
| */ | ||
| public dispatchEvent(event: Event) { | ||
| return this.ActualWorker.dispatchEvent(event) | ||
| } | ||
| } | ||
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| export default SharedWorkerPolyfill |