30 lines
674 B
JavaScript
30 lines
674 B
JavaScript
export class OnlineStatus extends ObservableValue {
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constructor() {
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super();
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this._onOffline = this._onOffline.bind(this);
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this._onOnline = this._onOnline.bind(this);
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}
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_onOffline() {
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this.emit(false);
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}
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_onOnline() {
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this.emit(true);
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}
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get value() {
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return navigator.onLine;
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}
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onSubscribeFirst() {
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window.addEventListener('offline', this._onOffline);
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window.addEventListener('online', this._onOnline);
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}
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onUnsubscribeLast() {
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window.removeEventListener('offline', this._onOffline);
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window.removeEventListener('online', this._onOnline);
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}
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}
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