26 lines
708 B
TypeScript
26 lines
708 B
TypeScript
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// @strict: true
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interface IListenable {
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changeListeners: Function[] | null
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observe(handler: (change: any, oldValue?: any) => void, fireImmediately?: boolean): void
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}
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function notifyListeners<T>(listenable: IListenable, change: T) {
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}
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export class ObservableValue<T> {
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constructor(
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public value: T
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) {
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const newValue: T = value;
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const oldValue: any = null;
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notifyListeners(this, {
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type: "update",
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object: this,
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newValue,
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oldValue
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});
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}
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changeListeners: Function[] | null = [];
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observe(handler: (change: any, oldValue?: any) => void, fireImmediately?: boolean) {}
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}
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